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本題， ほんだい
1. main topic, main subject, main issue, main question
2. this subject
tbd
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ようにする， 様にする
1. to see to it that ..., to make sure that ..., to try to ..., to make an effort to ...
tbd
から
1. from (e.g. time, place, numerical quantity), since
2. from (originator), by
3. because, since
4. out of (constituent, part)
5. through (e.g. window, vestibule)
6. after, since
7. expresses sympathy or warning
从，自……；因为；被，用于……
