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tamnd's digital brain — notes, problems, research

42128 notes

完成 (wánchéng) — to complete

HSK 3 | verb | to finish, accomplish, or fulfill a task or goal

hsk-3vocabularya2
〜あっての / 〜あってこそ (only possible because of — prerequisite)

N1 grammar patterns 〜あっての and 〜あってこそ: expressing that X is an indispensable prerequisite for Y. 〜あってこそ adds emphatic force.

japanesen1grammarjlptあってのあってこそ
散文 (sǎnwén) — prose

HSK 5 | n | literary prose; an essay or lyrical prose piece

hsk-5vocabularyb2
右 — JLPT N5 Kanji

右 (u/yuu/migi): right. JLPT N5 kanji.

japanesekanjin5jlpt
店 — Kanji Reference

店 (store, shop): 8 strokes, JLPT N5. On: テン. Kun: みせ.

japanesekanjin5writing
辨析 (biànxī) — to analyze and differentiate

HSK 6 | verb | to examine closely in order to distinguish subtle differences

hsk-6vocabularyc1
可以 (kěyǐ) — can, may (permission or possibility)

HSK 2 | modal verb | expressing permission or general possibility; contrast with 能 for ability

hsk-2vocabularya1
N4 Kanji: 書 (Write, Book)

JLPT N4 kanji 書 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.

japanesen4jlptkanjilanguage-learning
进步 (jìnbù) — to improve / progress

HSK 4 | verb / noun | to make progress; to improve; progress

hsk-4vocabularyb1
〜さえ〜ば — JLPT N2 Grammar

Learn how to use 〜さえ〜ば (sae ~ ba) to express the minimum sufficient condition — 'if only ~, then everything is fine.' Includes structure, nuance, examples, and comparisons.

japanesegrammarn2jlpt
N4 Kanji: 館 (Building, Hall, Mansion)

JLPT N4 kanji 館 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.

japanesen4jlptkanjilanguage-learning
协商 (xiéshāng) — to negotiate, to consult

HSK 5 | verb/noun | to discuss and reach agreement through mutual consultation

hsk-5vocabularyb2
标准 (biāozhǔn) — standard; criterion; up to standard

HSK 4 | noun/adj | an established measure or criterion used for comparison or judgment

hsk-4vocabularyb1
目 — Kanji Reference

目 (eye): 5 strokes, JLPT N5. On: モク、ボク. Kun: め.

japanesekanjin5writing
〜だけあって / 〜だけに — JLPT N2 Grammar

Learn 〜だけあって and 〜だけに to express outcomes that match or are expected given a particular quality or background.

japanesegrammarn2jlpt
生气 (shēng qì) — to get angry, angry

HSK 2 | verb/adjective | to get angry, to be angry

hsk-2vocabularya1
JLPT N5 Lesson 2: First Conversations — Greetings and Self-Introduction

Master the essentials of Japanese introductions, polite greetings, and basic sentence structure to start your first conversations with confidence.

japanesen5lessonjlpt
不管 (bùguǎn) — no matter; regardless of

HSK 3 | conjunction | no matter what/how/who — used in 不管...都/也 pattern

hsk-3vocabularya2
数据库 (shùjùkù) — database

HSK 5 | noun | an organized collection of structured data stored and accessed electronically

hsk-5vocabularyb2
主要 (zhǔyào) — main; primary; major

HSK 4 | adjective | the most important or central element

hsk-4vocabularyb1
〜をもとに / 〜をもとにして — JLPT N2 Grammar

Learn 〜をもとに and 〜をもとにして to express using something as raw material, inspiration, or source for creating or analyzing something new.

japanesegrammarn2jlpt
无论 (wúlùn) — no matter; regardless of

HSK 4 | conjunction | expressing unconditional situations

hsk-4vocabularyb1
Lesson 5: Location and Direction

Learn to describe where things are using 在 and position words like 上面, 里面, and 前面.

hsk-1lessona1
米饭 (mǐfàn) — cooked rice

HSK 1 | noun | cooked rice, steamed rice

hsk-1vocabularya1
变 (biàn) — to change

HSK 3 | verb | to change, become, or transform into a different state

hsk-3vocabularya2
CF 474D - Flowers

A dinner is represented as a sequence of flowers. A red flower contributes length 1, while white flowers are special: they may only appear in contiguous groups of exactly k flowers.

codeforcescompetitive-programmingdp
Lesson 12: Hobbies and Free Time

Learn to talk about your hobbies, ask yes/no questions, and use the -ad- suffix for ongoing activities.

esperantoa1lesson
培养 (péiyǎng) — to cultivate; to train; to develop

HSK 4 | verb | to nurture and develop a skill, person, or quality

hsk-4vocabularyb1
JLPT N5 Lesson 9: Past Tense and Timeline

Express past events in Japanese using verb, adjective, and noun past forms, and use timeline vocabulary to sequence events in time.

japanesen5jlptlessonlanguage-learning
礼貌 (lǐmào) — polite, politeness

HSK 4 | adjective / noun | polite, showing good manners

hsk-4vocabularyb1
立场 (lìchǎng) — standpoint; position

HSK 5 | noun | a person's or group's point of view or stance on an issue

hsk-5vocabularyb2
曾经 (céngjīng) — once; formerly; at some point

HSK 4 | adverb | indicating something happened in the past but no longer continues

hsk-4vocabularyb1
平时 (píngshí) — usually

HSK 3 | adverb / noun | usually, ordinarily — during normal or ordinary times

hsk-3vocabularya2
千 — Kanji Reference

千 (thousand): 3 strokes, JLPT N5. On: セン. Kun: ち.

japanesekanjin5writing
合伙人 (héhuǒrén) — partner; business partner

HSK 4 | noun | a person who shares in a business venture or partnership

hsk-4vocabularyb1
Lesson 2: Aspect and Participle Nuance

Master Esperanto's six-form participle system, distinguishing ongoing from completed states, and use participial nouns, adverbs, and compound tenses fluently.

esperantob2lesson
少 (shǎo) — few / little / a small amount

HSK 1 | adjective | few, a little, not many

hsk-1vocabularya1
自己 (zìjǐ) — oneself; self

HSK 3 | pronoun | referring to the subject themselves

hsk-3vocabularya2
部分 (bùfen) — part / portion / section

HSK 3 | noun | a section or component of a larger whole

hsk-3vocabularya2
办公室 (bàngōngshì) — office

HSK 3 | noun | a room or building used for work

hsk-3vocabularya2
进而 (jìn'ér) — furthermore; and then; going further

HSK 5 | conjunction | a logical connector indicating a further step or consequence

hsk-5vocabularyb2
确认 (quèrèn) — to confirm; to verify

HSK 5 | verb | to confirm; to acknowledge as correct

hsk-5vocabularyb2
正确 (zhèngquè) — correct

HSK 3 | adjective | correct, right, accurate — conforming to fact or standard

hsk-3vocabularya2
感激 (gǎnjī) — to be grateful; gratitude

HSK 5 | verb/noun | to feel grateful; deep gratitude and appreciation

hsk-5vocabularyb2
〜に至って / 〜に至っては — JLPT N1 Grammar

N1 grammar pattern 〜に至って(は): expressing 'now that it has come to ~, upon reaching this extreme point, at this point finally.'

japanesegrammarn1jlpt
JLPT N3 — Grammar (~200 Patterns)

Complete N3 grammar reference: ~200 patterns including conjunctions, conditions, degree expressions, formal structures, and nuanced patterns that distinguish N3 from N4. Each pattern includes structure, meaning, and 3+ example sentences.

japanesejlptjlpt-n3grammarlanguage-learning
强调 (qiángdiào) — to emphasize; to stress

HSK 4 | verb | to give special weight or importance to a point

hsk-4vocabularyb1
電 — JLPT N5 Kanji

電 (den/): electricity. JLPT N5 kanji.

japanesekanjin5jlpt
开发 (kāifā) — to develop; to exploit

HSK 5 | verb / noun | to develop; to open up resources or products

hsk-5vocabularyb2
辨别 (biànbié) — to distinguish, to differentiate

HSK 6 | verb | to tell apart, to discern differences between things

hsk-6vocabularyc1
管理 (guǎnlǐ) — management; to manage

HSK 5 | verb/noun | to manage, administer, or oversee; management

hsk-5vocabularyb2
Lesson 8: Conjunctions and Discourse Connectors

Learn to link ideas, sentences, and paragraphs using coordinating and subordinating conjunctions and discourse markers for coherent, flowing Esperanto.

esperantob1lesson
饭馆 (fànguǎn) — restaurant

HSK 1 | noun | restaurant, eatery

hsk-1vocabularya1
Work and Business Vocabulary

Japanese work and business vocabulary: professions, office settings, keigo expressions, job hunting terms, and workplace culture.

japanesevocabularyworkbusinessjlpt-n3language-learning
分析 (fēnxī) — to analyze; analysis

HSK 4 | verb/noun | to break down a subject into its components in order to understand it

hsk-4vocabularyb1
弘扬 (hóngyáng) — to promote; to carry forward; to glorify

HSK 5 | verb | to promote and spread something admirable, especially cultural or moral values

hsk-5vocabularyb2
JLPT N5 Lesson 10: Wanting and Planning

Master the art of expressing desires, making suggestions, and articulating your future intentions in Japanese.

japanesen5lessonjlpt
原则 (yuánzé) — principle

HSK 3 | noun | a fundamental rule or standard guiding behavior

hsk-3vocabularya2
月 — Kanji Reference

月 (moon, month): 4 strokes, JLPT N5. On: ゲツ、ガツ. Kun: つき.

japanesekanjin5writing
Lesson 7: Law & Politics

Master the vocabulary and grammar of Chinese legal and political discourse, enabling engagement with official documents, legal texts, and political commentary.

hsk-5lessonb2
Lesson 22: Writing Academic Essays

Master the structure and language conventions of Chinese academic essays, including argumentative thesis writing, paragraph development, and formal transitions.

hsk-5lessonb2
接受 (jiēshòu) — to accept; to receive; to take

HSK 4 | verb | to willingly take or agree to something offered

hsk-4vocabularyb1
顺序 (shùnxù) — order / sequence

HSK 3 | noun | the proper or logical sequence in which things are arranged

hsk-3vocabularya2
联系 (liánxì) — to contact; to get in touch; connection

HSK 4 | verb / noun | establishing or maintaining a link between people or things

hsk-4vocabularyb1
晩 — JLPT N5 Kanji

晩 (ban/): evening. JLPT N5 kanji.

japanesekanjin5jlpt
万 — Kanji Reference

万 (ten thousand): 3 strokes, JLPT N5. On: マン、バン. Kun: よろず.

japanesekanjin5writing
同意 (tóngyì) — to agree

HSK 3 | verb | to agree, to consent, to approve

hsk-3vocabularya2
难 (nán) — difficult

HSK 1 | adjective | difficult, hard. Antonym: 容易 (róngyi)

hsk-1vocabularya1
容易 (róngyì) — easy

HSK 1 | adjective | easy, simple. Antonym: 难 (nán)

hsk-1vocabularya1
振奋 (zhènfèn) — to invigorate; inspiring; uplifting

HSK 5 | verb/adjective | to inspire; to invigorate; filled with excitement and spirit

hsk-5vocabularyb2
传媒 (chuánméi) — media; mass media

HSK 5 | noun | media; mass media; communications industry

hsk-5vocabularyb2
态度 (tàidu) — attitude

HSK 3 | noun | attitude, manner, approach — how someone behaves or feels toward something

hsk-3vocabularya2
快 (kuài) — fast / quick

HSK 1 | adjective, adverb | fast, quick, quickly, soon

hsk-1vocabularya1
着急 (zháojí) — anxious, worried, in a hurry

HSK 2 | adjective/verb | to be anxious, worried, or in a rush

hsk-2vocabularya1
背景 (bèijǐng) — background; context; backdrop

HSK 4 | noun | the background or context of a situation

hsk-4vocabularyb1
Lesson 3: Professional Communication

Mastering formal written and spoken Esperanto for business correspondence, academic writing, conference presentations, and professional contexts.

esperantoc1lesson
Lesson 10: Getting Around

Learn to ask for and give directions, name places in a city, and talk about transport in Esperanto.

esperantoa1lesson
大 — JLPT N5 Kanji

大 (dai/tai/oo-kii): big. JLPT N5 kanji.

japanesekanjin5jlpt
被 (bèi) — passive marker

HSK 3 | preposition | marks passive voice, indicating the subject is acted upon

hsk-3vocabularya2
因为 (yīnwèi) — because

HSK 1 | conjunction | introduces a reason or cause, paired with 所以

hsk-1vocabularya1
警示 (jǐngshì) — to warn; a warning

HSK 5 | verb / noun | to caution or alert; a cautionary sign or message

hsk-5vocabularyb2
潜在 (qiánzài) — Potential, latent, hidden

HSK 5 | adjective | existing below the surface; not yet apparent; potential

hsk-5vocabularyb2
宣传 (xuānchuán) — Publicize

HSK 4 | verb/noun | to publicize, to promote; publicity, propaganda

hsk-4vocabularyb1
Lesson 20: Reading Connected Latin — Putting It All Together

A review lesson integrating all novice grammar in context: sentence-by-sentence analysis of two Latin passages, a curriculum summary, and independent reading practice.

latinnovicelesson
CF 479C - Exams

We are given a collection of exams, each with two relevant days. The official schedule assigns exam i a day ai, but the student has a special agreement allowing him to take it earlier on day bi, where bi < ai.

codeforcescompetitive-programminggreedysortings
Lesson 9: Transportation

Learn to talk about getting around using 怎么去 and 坐 + vehicle, and navigate common travel situations.

hsk-1lessona1
提到 (tídào) — to mention; to bring up

HSK 4 | verb | to refer to something briefly in speech or writing

hsk-4vocabularyb1
听 (tīng) — to listen, to hear

HSK 1 | verb | to listen to or hear something

hsk-1vocabularya1
中文 (Zhōngwén) — Chinese (written/general)

HSK 1 | noun | Chinese language, written Chinese

hsk-1vocabularya1
从而 (cóng'ér) — thus; thereby; and as a result

HSK 5 | conjunction | thus; thereby; consequently; so as to

hsk-5vocabularyb2
Lesson 4: Past Events

Talk about what happened using the completion marker 了, negate past actions with 没有, and use 刚才 for recent events.

hsk-2lessona1
哪 (nǎ) — which

HSK 1 | pronoun/determiner | interrogative asking for selection among options

hsk-1vocabularya1
〜に反して — JLPT N2 Grammar

Learn how to use 〜に反して (ni hanshite) to express 'contrary to' or 'against' expectations, rules, or wishes. Includes structure, nuance, examples, and comparisons.

japanesegrammarn2jlpt
思维 (sīwéi) — thinking, thought

HSK 6 | n | the cognitive faculty of thinking; a mode or pattern of thought

hsk-6vocabularyc1
啊 (a) — sentence-final particle

HSK 2 | particle | expressive sentence-final particle with four tonal variants

hsk-2vocabularya1
表明 (biǎomíng) — to indicate; to make clear; to show

HSK 4 | verb | to clearly express or demonstrate something

hsk-4vocabularyb1
质量 (zhìliàng) — quality

HSK 3 | noun | quality, standard — how good or poor something is

hsk-3vocabularya2
简洁 (jiǎnjié) — concise; brief; succinct

HSK 4 | adjective | concise, brief, and free of unnecessary content

hsk-4vocabularyb1
处于 (chǔyú) — Be in a state of

HSK 4 | verb | to be in (a state, position, or situation)

hsk-4vocabularyb1
培训 (péixùn) — Train

HSK 4 | verb/noun | to train, to provide training; training

hsk-4vocabularyb1