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病弱， びょうじゃく

1. weak (constitution), sickly, feeble, in poor health

tbd

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研究， けんきゅう

1. research, study, investigation

研究

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妨げ， さまたげ

1. obstruction, hindrance

tbd

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が

1. indicates the subject of a sentence 2. indicates possession 3. but, however, (and) yet, though, although, while 4. and 5. used after an introductory remark or explanation 6. regardless of ..., whether ... (or not), no matter ... 7. indicates a des...

tbd

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の

1. indicates possessive 2. nominalizes verbs and adjectives 3. substitutes for "ga" in subordinate phrases 4. (at sentence-end, falling tone) indicates a confident conclusion 5. (at sentence-end) indicates emotional emphasis 6. (at sentence-end, risi...

句尾起强调作用；助词，表示所有关系

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