I told him not to let it go, but he said it was time.

我叫他扶着车子别松手，他却说是时候了。

youdao

You can play jokes on someone, but take care not to let it go overboard.

你可以跟某人开玩笑，但切忌不要玩得太过火了。

youdao

He did not quite mean to let go, but he did it, and immediately he was borne across the room.

他不太敢飞，但他还是飞起来了，而且立刻被带到了房间的另一边。

youdao

But as long as central government provides 70% of the money for local government, it is hard, if not impossible, for it to let go.

ECONOMIST: Bagehot

But ye were still to bash them, ye were not to let them go else they were going to grow up and it would be a plague of them, so ye had to do it and ye did not want to because if they were just wee and they were babies, but ye had to.

NPR: Excerpt: 'Kieron Smith, boy'

But while he was sad to see him leave the Essex club for the north-west, Duncan said it would have been wrong not to let him go.

BBC: Southend support Orenuga switch