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1·The biggest challenge we all face is to prevent further environmental disasters. We must take action before it is too late.

我们面临的最大挑战就是避免更严重的环境灾难。我们必须尽快采取行动。

2·His cousins, Ted and Kate, have to follow clues (线索) around London and find him before it is too late.

他的表兄弟泰德和凯特必须根据伦敦周遭的线索，在为时已晚之前找到他。

3·It is time that we do something for the giraffe before it is too late.

现在是时候为长颈鹿做点什么了，否则就太晚了。

4·Now is the time for you to pull back before it is too late.

现在是你悬崖勒马的时候了。《新英汉大辞典》

5·Repent, before it is too late!

忏悔吧，现在还为时不晚！

6·We must act now before it is too late!

我们此时务必立即采取行动，否则太迟了！ %。

7·We must take action before it is too late.

我们必须趁早采取行动，否则来不及了。

8·We have to take action before it is too late.

我们必须采取行动，否则就太晚了。

9·It is also what we need before it is too late.

如果为时不晚，这也是我们所需要的。

10·They have come to warn us, before it is too late.

他们是来警告我们，以免为时过晚。