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忘れ物， わすれもの
1. lost article, thing left behind
2. leaving something behind, forgetting something
遗失物品
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ない， 無い
1. nonexistent, not being (there)
2. unowned, not had, unpossessed
3. unique
4. not, impossible, won't happen
5. not
6. to not be, to have not
tbd