thin air
短语<非正>无影无踪，虚无的状态
发音
AU
/ˌθɪn ˈɛə(ɹ)/
释义与例句
n.
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1.
An unknown location; (by extension) apparent disappearance or nonexistence.
比喻 幽默 习语 不可数Where did you think the exhaust would go? Into thin air?
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2.
Used other than figuratively or idiomatically: see thin, air, (especially, low-density air as a result of high altitude).
不可数You'll need to stay mindful of taking breaks, drinking water, and avoiding overexertion up here, because you're dealing with thin air at this altitude.