释义
it is impossible to know
不得而知。
双语例句
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There is no saying what may happen.
很难说会发生什么事。
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There is no saying what may happen.
说出他要干什么是不可能的。
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There is no saying when he'll come.
很难说他何时回来。
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There is no saying when he'll come.
很难说他什么时候回来。
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There is no saying when he'll come.
很难说她何时回来。