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一体， いったい

1. (what) the heck, (why) in the world, (who) on earth 2. one object, one body, unity 3. one form, one style 4. one Buddhist image (or carving, etc.) 5. generally, in general

一体；到底(怎么回事)；通常，一般来说

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どうしたん

1. what's the matter?, what's wrong?

tbd

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だ

1. be, is

断定助动词，是，是也

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