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流行る， はやる
1. to be popular, to come into fashion
2. to be prevalent, to spread widely (e.g. disease), to be endemic
3. to flourish, to thrive
tbd
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
