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HSK 4 | grammar pattern | presenting two contrasting or complementary aspects

HSK 5 | noun | arrangement and organization of components within a whole

HSK 3 | adjective | clean, free from dirt or mess

HSK 5 | n/v | a rhetorical comparison; to describe something by likening it to something else

HSK 5 | noun phrase | the practice of protecting and preserving the natural environment

送る (おくる / okuru): to send. N4 level Japanese vocabulary.

HSK 1 | number | the digit four; considered unlucky in Chinese culture due to resemblance to 死 (death)

HSK 4 | noun | money received from work, business, or investment

HSK 1 | verb | to acquire something by paying money

HSK 4 | verb / adjective | fulfilling a need or feeling content

HSK 4 | adjective | going beyond the surface to reveal essential truth or insight

HSK 3 | preposition | about, concerning, regarding — introduces the topic of a statement

HSK 4 | verb | experiencing sudden surprise or shock

HSK 3 | noun | impression, mental image left by someone or something

HSK 4 | noun | a place or system where goods and services are exchanged

We start with a single group containing all given numbers. Whenever Toastman receives a group, he adds the sum of all numbers in that group to the score. If the group contains more than one number, Appleman may split it into two non-empty groups and send both back to Toastman.

HSK 3 | verb | to consider, to think over, to take into account

HSK 5 | verb / noun | to anticipate something with hope; hopeful expectation

HSK 2 | pronoun | refers to all the people in a group

HSK 5 | noun | a microscopic infectious agent; also used for computer viruses

Sindarin words for people, races, relationships, titles, and names for individuals.

HSK 5 | noun | a standard pattern or model of operation or behavior

Sindarin colour vocabulary and first encounter with soft mutation (lenition): why adjectives after nouns undergo consonant changes.

Discuss economic and business topics using 在...方面, 就...而言, and formal business vocabulary at B1 level.

Master Esperanto's location and movement prepositions, and learn the crucial rule for adding -n to show direction versus static position.

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

HSK 3 | noun | a numerical figure or digit

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

HSK 5 | verb/noun | to study independently, teach oneself; self-directed learning

The language of Chinese economic analysis — 就...而言 in economic framing, macroeconomic and microeconomic vocabulary, and the discourse of policy economics

Develop systematic strategies for reading complex Chinese texts efficiently, including contextual inference, identifying main ideas, and detailed comprehension.

HSK 3 | verb / noun | making a reasoned decision or assessment

HSK 5 | verb | to investigate deeply; to explore and inquire into the nature of something

HSK 4 | adjective | rough, not detailed, approximate

HSK 5 | verb / noun | to modify or fine-tune; a modification or revision

〜ために: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.

〜と: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.

HSK 1 | verb | to enter, to go into, to come in

HSK 3 | verb / noun | a firm commitment that something will happen

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

Sindarin dual number: dual pronouns for pairs, dual verb forms (attested and reconstructed), and the dual possessive — with cultural context on Elvish pairing.

HSK 3 | noun | knowledge; information learned through study or experience

HSK 5 | noun | the central claim or argument in a piece of reasoning

Learn how to use 〜てしかたがない (te shikataganai) to express uncontrollable feelings or irresistible urges — 'can't help but ~; irresistibly ~.' Includes structure, nuance, examples, and comparisons.

We are given a set of points on an infinite 2D grid, representing planets in a "meta-universe." The goal is to repeatedly split the set of planets along empty rows or columns that completely separate the set into two non-empty subsets, each lying on one side of the row or column.

Master the Latin perfect tense using the 3rd principal part, and distinguish completed from ongoing past action.

HSK 5 | noun | a subject or theme being talked about

HSK 4 | adjective/verb | fully developed, either physically or mentally

小 (shou/chii-sai): small. JLPT N5 kanji.

Master all five uses of cum with the subjunctive and indicative, including the tricky cum inversum.

HSK 5 | verb | to examine and check something carefully for accuracy or compliance

HSK 5 | noun | a branch of AI in which systems learn from data to improve performance

Master the two distinct uses of 〜次第: 'depending on' (conditional) and 'as soon as' (sequence), a critical N2 exam distinction.

HSK 3 | verb | to carry out, conduct, or be in progress

天 (ten/ame): heaven. JLPT N5 kanji.

HSK 2 | verb | to agree with, to consent to, to approve

HSK 4 | noun | opponent, rival, competitor

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

Master Esperanto's system of indirect speech, including tense non-backshift, reported questions, and commands in ke-clauses.

HSK 4 | adjective/adverb | done at the right time without delay

HSK 3 | noun | a tool or instrument used to accomplish a task

HSK 5 | noun/adjective | the principles governing right and wrong conduct

HSK 4 | verb / noun | to show; to perform; performance; behavior

HSK 5 | noun | a branch of academic study or knowledge

HSK 1 | number | the digit five

HSK 1 | measure word | classifier for long, narrow, or flexible objects

Learn how to compare people and things using 比, 没有, and 一样 in natural Chinese.

HSK 6 | conj | used to add a further reason or consideration, strengthening a previous point

HSK 3 | noun | grades, scores, results; the achievement produced by effort

Sindarin adjectives: post-nominal position, lenition after nouns, plural forms, and the copula 'to be'.

HSK 2 | conjunction | therefore, so, that is why (result connector)

HSK 1 | noun | question, problem, issue

HSK 4 | noun | facts, data, or news communicated or received

HSK 1 | noun | friend

HSK 1 | number | the digit two; used in isolation, ordinals, and compound numbers

HSK 1 | particle | asks 'and what about...?' or softens a statement

HSK 4 | noun | channels of mass communication

HSK 3 | verb | to flip, turn over, or browse through something

HSK 5 | noun | a course of study; a curriculum or program of classes

HSK 4 | adjective | proceeding without obstacles or difficulties

HSK 4 | noun | a mechanism or organized system for how something works

HSK 5 | noun | money paid for the use of borrowed capital, or earned on savings

HSK 4 | noun / verb | an activity, event, or campaign; to move around

HSK 3 | noun | police officer, policeman, the police

Full paradigms for 4th-declension masculine and neuter nouns and 5th-declension nouns, with key vocabulary and the special behavior of domus.

HSK 3 | noun/verb | a shift or transformation in state or condition

HSK 3 | verb | to be acquainted with someone; to recognize or identify

HSK 1 | greeting phrase | asks about someone's wellbeing

HSK 4 | noun | classmate, schoolmate

HSK 5 | verb | to breed, to nurture, to cultivate (plants, organisms, or people)

Discuss technology and innovation using 利用 + tech + V and vocabulary for AI, big data, and the internet at B1 level.

Learn everyday Japanese verbs, understand u-verb and ru-verb conjugation, and express present, past, and negative actions using the polite ます form.

HSK 4 | noun | a legally binding written agreement between parties

黒 (koku/kuro): black. JLPT N5 kanji.

HSK 5 | noun/adjective | the state of being equal, especially in rights and status

Learn 〜さえ〜ば (if only ~, as long as ~) — the N3 conditional expressing a single minimal sufficient condition.

HSK 5 | noun | an unfair preconceived opinion not based on reason or experience

HSK 5 | verb | to be the first to establish or bring something into existence

HSK 3 | adjective | strong, powerful, capable — describes strength or superiority