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公私， こうし

1. public and private matters, official and personal affairs, professional and personal lives

tbd

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けじめをつける， ケジメをつける， けじめを付ける

1. to draw the line (between two situations), to make a clear distinction, to make it clear where one stands 2. to take clear responsibility for (mistakes, etc.)

tbd

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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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