1、retrieve

取回;找回

He reached over and retrieved his jacket from the back seat.

他伸手从后座上取回了自己的夹克。

The men were trying to retrieve weapons left when the army abandoned the island.

士兵们正试图找回军队从该岛撤退时留下的武器。

（计算机、大脑）检索，搜索（信息）

Computers can instantly retrieve millions of information bits.

计算机可以立即检索到数百万条信息。

As the child gets older, so his or her strategies for storing and retrieving information improve.

随着孩子们长大，他们储存和检索信息的能力也会提高。

使重新回到，挽回(某种局面)

He is the one man who could retrieve that situation.

他是唯一能挽回局面的人。

2、tighten

抓紧;攥紧

Luke answered by tightening his grip on her shoulder.

卢克的回应就是把她的肩头抓得更紧了。

Her arms tightened about his neck in gratitude.

她充满感激，把他的脖子搂得更紧了。

(对…)严加控制;(使)加强控制

He knows he has considerable support for his plans to tighten his grip on the machinery of central government.

他清楚有相当多的人支持他对中央政府机构加强控制的计划。

As the regime's grip on the mainland tightened over the next few years, hundreds of thousands more people fled south.

随着后来几年那个政权加强对大陆的控制，又有数十万人逃往南方。