Their future depends on the action we take now, and we must not fail them.

他们的未来取决于我们现在采取的行动，我们绝不能辜负他们。

youdao

At the present time, we must not fail to take the strength of these sections into account and must be circumspect in our relations with them.

目前我们决不能不顾到这些阶层的力量，我们必须谨慎地对待他们。

youdao

We must not fail to acknowledge his favour.

我们必须感谢他的关照。

youdao

In this task, we must not fail - the economic future of the UK depends upon it.

BBC: Viewpoint: UK economic future 'depends on engineers'

We must have the courage to fail those who are not keeping up.

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