brain
tamnd's digital brain — notes, problems, research
41993 notes
HSK 4 | noun | an official course of action adopted by a government or organization
HSK 5 | conjunction | therefore, as a result, consequently
HSK 5 | discourse marker | in other words; to put it another way
Learn 〜に従って (in accordance with / as ~ progresses) — the N3 pattern for expressing compliance with rules and proportional change.
HSK 1 | adverb | indicates future repetition of an action
青 (sei/shou/ao): blue. JLPT N5 kanji.
HSK 4 | noun | a specific area of activity, knowledge, or interest
HSK 5 | noun | intrinsic property or attribute belonging to something
Master six N3 scope and contrast patterns: 〜だけでなく〜も, 〜ばかりでなく, 〜どころか, 〜わけではない, 〜とは限らない, and 〜にほかならない — with full nuance analysis.
HSK 4 | noun | the organized body of people sharing a culture and institutions
HSK 2 | noun | a point in time, a moment, an occasion (contrast with 时间)
HSK 4 | adjective | not in accordance with reason or logic
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.
HSK 5 | verb/noun | physical exercise, mental training, or the tempering of character
HSK 5 | verb/noun | computer programming; to write or code a program
Explore the main uses of the dative (indirect object, possession, reference) and ablative (means, manner, accompaniment, time, prepositions).
HSK 1 | measure word | classifier for bound volumes
HSK 4 | noun | a physical or figurative path or bearing
HSK 4 | verb | to stop pursuing or holding onto something
HSK 1 | verb | to close, to shut, to turn off
〜と思う: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.
Discuss health and medical topics using advanced 被 constructions and 受 + emotional/physical state at B1 level.
We are given an array of n non-negative integers. A group is any non-empty subset of array indices. For a chosen group, we take the bitwise AND of all values at those indices. The task is to count how many non-empty groups have bitwise AND equal to 0.
HSK 5 | n/v | a rhetorical comparison; to describe something by likening it to something else
We are given a line of ants, each with an integer strength. Mole wants to observe fights among ants in specified contiguous segments of the line. For a given segment from position l to r, every ant fights every other ant within that segment.
HSK 1 | verb | to write characters, text, or content
Master five N3 patterns that express change, proportion, and conditionality: 〜によって (depending on), 〜に従って (in accordance with), 〜につれて (proportional change), 〜とともに (together with/as), and 〜に応じて (in response to).
HSK 4 | adjective | produced without synthetic chemicals; relating to organic chemistry
HSK 1 | conjunction | introduces a reason or cause, paired with 所以
HSK 1 | noun | a calendar month; also the word for the moon
Esperanto vocabulary for body parts, health, illness, medical situations, and physical descriptions.
HSK 1 | adjective / preposition | correct, right; directed at, towards
HSK 4 | verb/noun | to provide explanation or commentary
HSK 4 | noun | an organized collection of structured data
HSK 5 | verb | to refute forcefully; to rebuke
HSK 4 | verb / adjective | fulfilling a need or feeling content
Engage with Chinese scientific discourse, technology journalism, and research communication using specialized vocabulary and evidence-based grammar patterns.
Learn to express two actions happening at the same time using 一边...一边, 边...边, and 同时, with attention to which verbs can combine.
HSK 3 | noun | the image or impression someone or something projects
HSK 1 | noun | clothes, clothing, garment
HSK 1 | phrase | confirms a factual statement; equivalent to 'yes, that is correct'
男 (man, male): 7 strokes, JLPT N5. On: ダン、ナン. Kun: おとこ.
東 (east): 8 strokes, JLPT N5. On: トウ. Kun: ひがし.
Master four essential N3 formal conjunctions: 〜において/〜における (in/at), 〜に対して/〜に対する (toward/against), 〜にとって (for/from the perspective of), and 〜として (as/in the capacity of).
Master the 把 construction to express deliberate actions performed on a specific object, a core pattern in spoken and written Mandarin.
HSK 4 | noun | edible plant parts such as leaves, roots, and stems
HSK 2 | conjunction | then, after that (sequence connector)
HSK 5 | noun | the ability to recover from adversity and adapt to challenges
Sindarin subject pronouns: independent forms for emphasis and suffix forms attached to verbs; all 6 persons with attested examples.
HSK 1 | pronoun | first-person singular pronoun
HSK 4 | noun / verb | a formal speech or lecture; to deliver a speech
Common Japanese sentence patterns organized by JLPT level N5 through N1, with structure, usage notes, and example sentences for each pattern.
HSK 4 | noun | journalist; reporter; correspondent
HSK 3 | noun | the measure or extent of something
HSK 4 | noun | the reason or inner drive behind an action
本 (book, origin): 5 strokes, JLPT N5. On: ホン. Kun: もと.
HSK 3 | noun | the proper or logical sequence in which things are arranged
HSK 5 | verb/noun | to strive against others for a goal; rivalry
HSK 4 | noun | a personal position or way of looking at something
HSK 5 | verb/noun | to govern or manage; systematic control and management
HSK 2 vocabulary: ~200 new words added at level 2 (cumulative 498). Comprehensive table with Chinese, pinyin, English, part of speech, and examples.
Engage with Chinese discourse on international relations, foreign policy, and globalization, mastering the vocabulary and grammar of global governance.
HSK 5 | adjective/adverb | indicating something is not absolute but comparative or relational
HSK 4 | verb/noun | to draw together key points into a conclusion
HSK 5 | adjective | existing below the surface; not yet apparent; potential
N1 grammar pattern 〜に至って(は): expressing 'now that it has come to ~, upon reaching this extreme point, at this point finally.'
HSK 6 | n | a guiding idea, philosophical concept, or core belief underlying a practice or system
子 (shi/su/ko): child. JLPT N5 kanji.
HSK 4 | verb/noun | to make a choice or the act of deciding
一 (one): 1 strokes, JLPT N5. On: イチ、イツ. Kun: ひと、ひと-つ.
HSK 1 | adverb | still (ongoing), also/in addition, even more
HSK 4 | verb | indicating the core reason or essence of something
HSK 6 | verb | to provide a complete and authoritative interpretation
Describe symptoms, answer a doctor's questions, and understand medical instructions in Chinese.
We are given a network of nodes connected by links, where each link can carry data in one direction at a time. Each link has a cost proportional to the square of the bandwidth multiplied by a given weight.
HSK 4 | noun | a fixed deadline or time limit for completing something
HSK 3 | preposition | marks the object of a disposal action, placed before the verb
HSK 4 | noun | the spot or role something or someone occupies
HSK 1 | noun | bed
Mastering 法律文书 writing conventions and the specialized register of Chinese legal discourse.
HSK 2 | noun | father's mother (paternal grandmother)
HSK 3 | adjective | cute, adorable, or lovely
HSK 4 | n | money collected by the government through taxes
Mastering the full 学术语体 register for academic writing and scholarly discourse in Chinese.
HSK 3 | verb | to pick up a person, answer a call, or receive something
Master the -us ending for wishes, hypotheticals, polite requests, and both real and unreal conditional sentences.
HSK 3 | noun | manufactured goods or output of a process
HSK 5 | noun | predicament, difficult situation, dilemma, plight
Step-by-step Esperanto learning roadmap from absolute beginner to complete mastery.
HSK 3 | verb | to put down, to set down, to let go of
HSK 1 | adjective, adverb, interjection | good, well, OK, sure
HSK 3 | verb/noun | to make a journey to another place
HSK 5 | verb/noun | to uplift and motivate someone through an energising or moving influence
HSK 3 | measure word | a unit of time lasting sixty seconds
HSK 5 | verb | to release; to issue officially; to publish
HSK 4 | adjective | having a connection or relationship to the subject at hand
ずっと (ずっと / zutto): all along, continuously. N4 level Japanese vocabulary.
N1 grammar patterns 〜極まりない and 〜極まる: expressing that something is extremely [negative quality], often used to express outrage, embarrassment, or strong negative evaluation.
HSK 4 | conjunction | introducing a contrast or exception