立彬の日本語

主任技師は助手と協力して研究した。

tbd

The chief engineer did research hand in hand with his assistant.
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主任， しゅにん
1. person in charge, senior staff, manager, chief, head
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技師， ぎし
1. engineer, technician
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協力， きょうりょく
1. cooperation, collaboration, help, support
合作、协作、帮助、支持
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研究， けんきゅう
1. research, study, investigation
研究
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は
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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助手(じょしゅ)
と
と
1. if, when 2. and 3. with 4. used for quoting (thoughts, speech, etc.) 5. promoted pawn 6. indicates a question
表示引用
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為る(する){して}
する， 為る
1. to do, to carry out, to perform 2. to cause to become, to make (into), to turn (into) 3. to serve as, to act as, to work as 4. to wear (clothes, a facial expression, etc.) 5. to judge as being, to view as being, to think of as, to treat as, to use...
做，作，干，执行
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為る(する){した}
する， 為る
1. to do, to carry out, to perform 2. to cause to become, to make (into), to turn (into) 3. to serve as, to act as, to work as 4. to wear (clothes, a facial expression, etc.) 5. to judge as being, to view as being, to think of as, to treat as, to use...
做，作，干，执行
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