au
abbr.
author 作者;
aurum (Latin=gold) （拉丁语）金;
arbitraryunit(s) 任意单位;
antitoxin unit 抗毒素单位;
例句:
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Spoon the mixture into the puff pastry vol-au-vent cases.
来自BBC
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I'm new here so I'm not completely au fait with the system.
我初来乍到，所以对这个系统还不完全熟悉。
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The fish is served au naturel, uncooked and with nothing added.
这条鱼是生吃的，未经蒸煮，也没加任何调味品。
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I was sometimes dumped with my grandmother or left with highly unsuitable au pairs.
有时我被扔给奶奶照看，或者被交给毫无经验的临时保姆。
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Top each vol-au-vent with a small pastry circle.
来自BBC
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It looks like goodbye rather than au revoir.
来自THETIMES