His efforts to tighten up quality control led to a commercial coup.

他努力加强质量把关，赢得了巨大的商业成功。

youdao

When trying to hit the ball hard, most players tend to tighten up.

在大力击球前，多数球手都会把肌肉绷得很紧。

youdao

We need to tighten up security at the prison.

我们必须加强监狱的安全性。

youdao

We need to tighten up security at the prison.

我们必须加强监狱的安全性。

youdao