squeaky clean

基本解释

And the squeaky clean mice, even with the risky gene, stayed healthy.
而这些异常洁净的小实验鼠即使携带了高危基因，也依然健康茁壮。
The TV was on, the lights were bright, the place was squeaky clean, but it was eerily deserted.
电视机正开着，灯光明亮，地方极其整洁，但空荡得使人感到神秘。
Their streets, air and tap water are squeaky clean and chocolate is a national obsession.
他们的街道、空气和自来水都干净得没话说，而且人人都酷爱巧克力。
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The spike recently spread to the Magnificent Mile, the squeaky clean shopping district downtown.
FORBES: Chicago, Summer Crime, and the Slide Toward Detroit
The second reason is that sequestration offers a fine stepping-stone to squeaky clean hydrogen energy.
ECONOMIST: The environment
In this case, the tattoo-for-pay-gate they experienced means hiring instead a squeaky clean disciplinarian.
FORBES: For Ohio State's Urban Meyer, Success Could Bring Misery

If you say that someone is squeaky clean, you mean that they live a very moral life and have never done anything wrong.