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1·The kitchen was clean as a whistle.

厨房里一尘不染。《柯林斯英汉双解大词典》

2·She's clean as a whistle.

她象口哨一样亮丽。

3·Here's your room; it's clean as a whistle.

这是你的房间，简直一尘不染。

4·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。