as clean as a whistle 光滑 ; 非常洁净 ; 非常干净
as clean as whistle
干干净净
以上为机器翻译结果，长、整句建议使用 人工翻译 。
I checked the room for concealed wiring, but it was as clean as a whistle.
我检查房间里有无暗线，但房间里干干净净的什么也没发现。
youdao
Next, more sluicing, followed by a shampoo, and voila, you are clean as a whistle: the shiny kind.
BBC: A guide to Istanbul��s bath houses
In the Linz steel plant, clean as a whistle and done up in a colour scheme recommended by a feng shui expert, there is hardly anybody to be seen.
ECONOMIST: Who says heavy industry has had its day?
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