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ドブに捨てる, どぶに捨てる, 溝に捨てる, どぶにすてる
1. to throw down the drain, to waste
白白浪费
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呼び捨て, よびすて
1. addressing (someone) without using a suffix such as "-san" or "-chan" (considered impolite)
直接称呼(某人)而不使用“-san”或“-chan”等后缀(被视为不礼貌)