本題， ほんだい

1. main topic, main subject, main issue, main question 2. this subject

tbd

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音读: ホン  

训读:もと  

日检:4 grade:1 笔画数:5 部首:75

音读: ダイ  

训读:

日检:3 grade:3 笔画数:18 部首:181