tighten up

绷紧, 加强

例句与用法：

The police are tightening up on drunken driving.

警方目前采取严厉手段对付醉酒驾车行为。

He says he will take step to tighten up the administration.

他说他将采取措施加强行政管理。

详细释义：

1. 使变紧; 使更牢固

It needs tightening up.

它需要拉紧一些。

2. 使更严格; 使更有效

He said he would take steps to tighten up the administration.

他说他将采取措施加强行政管理。