precaution可数吗

precaution可数名词；

precaution

n. 预防措施;预防;防备；

复数 precautions，副词 precautionary

I\'ll keep the letter as a precaution.

我要保存这封信，以防万一。

I had taken the precaution of doing a little research before I left London

我已在离开伦敦前进行了准备，做了些调查研究。

Could he not, just as a precaution, move to a place of safety?

就算仅仅是为了以防万一，难道他就不能挪到安全的地方吗？

I took the precaution of clearing out my desk before I left.

我临走时特地事先把办公桌清理了一下。

As a precaution against earthquakes, the building is being reinforced.

为了防震，这座楼正在加固。