brain
tamnd's digital brain — notes, problems, research
41905 notes
HSK 1 | adverb | negates verbs and adjectives for present, future, or habitual
HSK 2 | noun | a point in time, a moment, an occasion (contrast with 时间)
Discuss urban living, infrastructure, and city development using 在 + city + 生活/工作 and city vocabulary at B1 level.
HSK 2 | adjective / noun | female gender; a woman or girl
HSK 1 | noun | doctor, physician
HSK 4 | preposition / noun | using something as a foundation or source
HSK 4 | adverb / conjunction | introducing an example or illustration
HSK 1 | number | ten thousand; the base large-number unit in Chinese counting
HSK 5 | phrase | a fixed expression introducing a comparative contrast
George wants to maximize his earnings by choosing segments of work from a list of tasks, each with a given profit. The tasks are arranged sequentially in an array p of length n. He must select exactly k non-overlapping segments, each of length m.
今 (now): 4 strokes, JLPT N5. On: コン、キン. Kun: いま.
HSK 5 | verb / noun | to embody; to give expression to
HSK 5 | noun | financial award given to support a student's education
入 (enter): 2 strokes, JLPT N5. On: ニュウ. Kun: い-る、い-れる、はい-る.
HSK 4 | noun | a mobile phone with advanced computing capabilities
JLPT N4 kanji 医 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.
何 (what): 7 strokes, JLPT N5. On: カ. Kun: なに、なん.
HSK 4 | noun | a theory or theoretical framework
HSK 1 | noun | classroom
HSK 5 | verb | to drive progress or move something forward systematically
HSK 4 | noun | a raised surface or an opportunity base for activity
HSK 1 | verb | seeing or viewing in multiple senses
HSK 2 | verb / adjective / noun | describes hard work and determined striving
HSK 4 | noun / verb | plan; to plan; to intend
HSK 5 | noun/adjective | a person or organization's public image; also vivid/concrete representation
HSK 1 | pronoun | interrogative pronoun for location (standard/southern form)
HSK 4 | adjective | diligent, hardworking
Master the fundamental stylistic differences between formal written prose and casual spoken Japanese required for N2 proficiency.
HSK 3 | adjective/adverb | nearly equal or approximately
HSK 4 | verb | to face; to confront; to deal with
HSK 1 | measure word | classifier for garments and affairs
HSK 4 | verb | to estimate or anticipate a future outcome
HSK 4 | adjective / noun | confident; self-confident; confidence
HSK 1 | verb | to close, to shut, to turn off
HSK 4 | n | a legally recognized member of a state
HSK 4 | verb / noun | establishing or maintaining a link between people or things
N1 grammar: comparing the literary particle 〜すら with the more neutral 〜でさえ and casual 〜でも for 'even.' Register hierarchy, emphatic force, and the unique 〜さえ〜ば conditional.
HSK 4 | noun | quality; standard; mass (physics)
HSK 1 | noun | public bus
Advanced Sindarin plural patterns: monosyllables, diphthong shifts, vowel intrusion, class plurals (-ath, -rim, -hoth), and the definite article with plurals.
We are given an undirected weighted graph representing cities and roads. City 1 is the capital. In addition to normal roads, there are special train routes that connect the capital directly to some city. The government wants to close as many train routes as possible.
We are given a line of floors from 1 to n. We start on floor a and we will make exactly k moves. Each move picks a new floor y different from the current floor x, but with a restriction: we are not allowed to move “too far” in absolute distance compared to a forbidden floor…
HSK 5 | noun | media; mass media; communications industry
黒 (koku/kuro): black. JLPT N5 kanji.
車 (sha/kuruma): vehicle. JLPT N5 kanji.
HSK 3 | verb | to remember something firmly; to commit to memory
HSK 1 | adjective | tired, fatigued, exhausted
HSK 1 | pronoun | third-person plural pronoun (all-female group)
HSK 5 | noun | established rules, regulations, or institutional arrangements
HSK 4 | verb/noun | to propose a course of action; a recommendation offered to others
HSK 5 | adjective / adverb / noun | basic and essential; at the most basic level; not at all (negative)
HSK 1 | verb / preposition | means to give or indicates the recipient of an action
We have a one-dimensional sheet of paper represented as an array of width n. Appleman can fold the sheet at a position p, which means the left segment [0, p) flips and lies over the right segment [p, currentwidth).
晩 (ban/): evening. JLPT N5 kanji.
Complete JLPT N5 vocabulary list with ~800 words organized by category: nouns, verbs (with て-form and た-form), adjectives, adverbs, particles, question words, and expressions.
Complete JLPT N1 vocabulary reference: ~4,000 new words beyond N2 covering academic, literary, political, legal, medical, and financial Japanese with readings, meanings, and usage contexts.
HSK 3 | adjective/noun | relating to the present era
Sindarin nouns: i-affection plural formation, the definite article, direct object marking, and the genitive construction.
Learn how direction complements combine with verbs to describe movement toward or away from the speaker, a key feature of Mandarin spatial expression.
Sindarin vocabulary for food, drink, and dining — with attested and Neo-Sindarin words, plus basic sentence construction practice.
HSK 4 | preposition / verb | passing through or using a method
HSK 5 | adjective/adverb | indicating something is not absolute but comparative or relational
HSK 2 | adjective | a feeling of happiness and joy
Classical-influenced formal patterns in modern Chinese — 以...之名, 为所欲为, 无论如何, and the grammar of extreme and universal quantification
HSK 1 | verb | to sing
HSK 4 | noun | the ability or capacity to compete effectively
HSK 2 | modal verb | expressing permission or general possibility; contrast with 能 for ability
HSK 1 | number | the digit three
HSK 4 | phrase | there is no need; it is unnecessary
HSK 4 | adjective | referring to a specific, pre-determined thing rather than a general one
Complete Sindarin verb conjugation for present tense: aorist (simple) and continuative (ongoing) for both A-stem and primary verb classes, all 6 persons.
Learn how to use 〜を通じて (wo tsujite) to express 'through,' 'throughout,' or 'via' when describing a medium, channel, or continuous span. Includes structure, nuance, examples, and comparisons.
HSK 4 | noun | the process or journey through which something develops
HSK 2 | measure word / adjective | counts items that come in pairs
HSK 5 | verb/noun | quantitative increase or growth in numbers
HSK 1 | adjective / preposition | correct, right; directed at, towards
Master Chinese numbers, measure words, and how to ask quantities with 几 and 多少.
HSK 5 | noun | the supreme law of a country that defines government structure and rights
HSK 4 | verb/noun | to clarify or describe something; a written explanation or instruction manual
時 (ji/toki): time. JLPT N5 kanji.
前 (before, front): 9 strokes, JLPT N5. On: ゼン. Kun: まえ.
HSK 4 | noun / adjective | mistake; error; wrong; incorrect
書 (write): 10 strokes, JLPT N5. On: ショ. Kun: か-く.
All Sindarin dictionaries compared — Parf Edhellen, Eldamo, Hiswelókë — with guidance on when to use each and how to interpret source period labels.
Learn how to use 〜に先立って (ni sakidatte) to express 'prior to' or 'before' when an action precedes an important event. Includes structure, nuance, examples, and comparisons.
HSK 5 | noun | cloud computing; internet-based computing services
HSK 4 | noun/verb | professor; to teach, to instruct
それから (それから / sorekara): and then, after that. N4 level Japanese vocabulary.
HSK 5 | verb | to be the first to establish or bring something into existence
Advanced theory and practice of translation into and from Esperanto — literary, technical, and cultural dimensions, with the translator's full toolkit.
HSK 4 | noun | the outward shape, structure, or format of something
JLPT N4 kanji 者 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.
英 (ei/): England. JLPT N5 kanji.
HSK 4 | verb / noun | to invite; an invitation
HSK 3 | verb | to lose a game, match, or contest
HSK 5 | adjective/noun | subjective; based on personal feelings rather than facts
HSK 5 | verb | to promote; to facilitate; to further
Sindarin words for people, races, relationships, titles, and names for individuals.
HSK 3 | noun / preposition | the space or position in the middle of something