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1·There is no knowing what may happen.

没人知道知道会发生什么事。

2·There is no knowing what he is doing.

无法知道他在做什么。

3·There is no knowing when he will come.

的翻译是：没有知道他何时将来。

4·There is no knowing when he can finish the book.

无法知道他何时才能写完这本书。

5·There is no knowing when we shall meet again.

不知道何时我们再相见。

6·There is no knowing what may happen tomorrow.

谁也不知道明天将发生什么。

7·There is no knowing when we shall finish this task .

不知何时我们能完成这项任务。

8·Anything could happen. There is no knowing what may happen.

任何事都可能发生。

9·There is no knowing whether we will be able to get enough raw materials.

还不知道，我们是否能够得到足够的原材料。

10·There is no knowing what he would have achieved if he had survived Munich.

没有人知道如果他能从慕尼黑空难中幸存，他还能获得多少荣誉。