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必ず， かならず
1. always, without exception, necessarily, certainly, without fail, positively, invariably
必须，必定
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立ち寄る， 立寄る， たちよる
1. to drop in (at), to drop by, to call at, to stop by, to stop off, to stop in
顺道拜访，顺路探望，临时造访，中途停留，顺路停留
家， いえ
1. house, residence, dwelling
2. family, household
3. lineage, family name
房子，住宅；家；家族
に
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
tbd
