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更新日期:2026-08-14
(as) clean as a whistle 见WHISTLE. (as) clean as a whistle extremely clean or clear 洁净; 清清楚楚。 ■ informal free of incriminating evidence 〈非正式〉没留下犯罪证据: the cops raided the warehouse but the place was clean as a whistle. 警察搜查了那个仓库, 但那个地方没有留下任何犯罪线索。