keep a watch on

• 注意

keep a watch on的用法和样例：

例句

1. It is easy to reduce if you watch your diet.
   你如果注意饮食，减肥并不难。
2. I noticed scores of sorrow on her face.
   我注意到她脸上悲痛的痕迹。

词汇搭配

• keep a careful watch on 密切注意