It's important to put a lock washer on that last nut, or it can work loose.

重要的是要在最后一个螺母上安装一个防松垫圈，否则它会逐渐变松。

《柯林斯英汉双解大词典》

Their confidence can also suffer because of frequent false alarms that are triggered when the straps work loose and the sensors break their contacts.

BBC: News | Sci/Tech | Smart baby suit checks for cot death

They could also think that as a result I'm not so interesting and that my work is where I let loose.

WSJ: Cindy Sherman

The lesson of not giving this All Blacks side any loose ball to work with was hammered home once again in the 22nd minute, as they claimed a second try.

BBC: Wales 25-37 New Zealand