除非在这里修个水库，才能解决灌溉问题。

Only when a reservoir is built here can we solve our irrigation problem.

《新英汉大辞典》

除非是不得已时，尽量不使用你的洗碗机或是洗衣机。

Run your dishwasher and washing machine only when full.

youdao

他很少同意这些看法，除非他已经意识到确实是错了。

He rarely acceded, and then only when he was already convinced that it was wrong.

youdao

他很少同意这些看法，除非他已经意识到确实是错了。

He rarely acceded, and then only when he was already convinced that it was wrong.

youdao