每日短语讲解 第153期:了如指掌
2018-10-07来源:和谐英语
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今日短语
at one's fingers' tips
了如指掌
例句：
It is at my fingers' tips. I think I can give you all the information right now.
这事我了如指掌，现在我就可以将全部情况告诉你。
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