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ついでに, 序でに, 序に
1. while (one is at it), when, on the occasion of, at the same time (as), on one's way (to), by the way, incidentally, in passing
顺便提一下,顺便讲一下
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秩序, ちつじょ
1. order, discipline, regularity, system, method
秩序,纪律,规律性,体系,方法