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四六時中， しろくじちゅう

1. around the clock, day and night

tbd

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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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彼， かれ

1. he, him 2. boyfriend

他

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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；表示与另一选项（无论是否明确提及）形成对比；表示强调

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