了然于胸
vt. understand
双语例句原声例句
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他们的用户对全局变量的概念应该了然于胸。
Their users already understood the concept of global variables.
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这样你就对那类信息可以泛读哪类需重点记忆了然于胸！
By doing this you can figure out what information is critical to memorize and what can be skimmed.
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他似乎对眼下的形势了然于胸，知道自己手中是多大的一个烂摊子。
He seems to 'get it' - 'it' being just how big a mess he has on his hands.
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They have beliefs about what I'm likely to do next.
它们对我的战术了然于胸
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