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彼女， かのじょ

1. she, her 2. girlfriend

她；女朋友

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理科， りか

1. science (inc. mathematics, medicine, etc.), natural science 2. science department (university), science course 3. science (as a school subject)

tbd

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を

1. indicates direct object of action 2. indicates subject of causative expression 3. indicates an area traversed 4. indicates time (period) over which action takes place 5. indicates point of departure or separation of action 6. indicates object of d...

表示动作的直接对象；表示经过的场所；表示离开或分开的点

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勉強， べんきょう

1. study 2. diligence, working hard 3. experience, lesson (for the future) 4. discount, price reduction

学习

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なければならない， なければなりません， なければいけない

1. have to do, must, should, ought to

必须，应该

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は

1. indicates sentence topic 2. indicates contrast with another option (stated or unstated) 3. adds emphasis

指示句子的主题

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