Word · 単語
序でに
Reading ついでに
while (one is at it)
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
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Not started
Mastered counts as known everywhere (frontier, map, extension) but never appears in the quiz again. New wipes the review history for this item.