他试图逃跑，但她紧紧地抓住他。

He tried to get away, but she held him ___fast.

他们将这些价值观视为牢牢固定幸福的锚。

They regard these values as anchors that hold happiness ___fast.

盖子被拧得很紧，所以不会掉下来。

The lid was screwed on ___fast, so it wouldn't come off.