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なんです, なのです
1. it is assuredly that ..., can say with confidence that ...
〜んです句型;可以肯定地说……,可以有把握地说……
が
1. indicates the subject of a sentence
2. indicates possession
3. but, however, (and) yet, though, although, while
4. and
5. used after an introductory remark or explanation
6. regardless of ..., whether ... (or not), no matter ...
7. indicates a des...
tbd