keep a watch on

基本解释

She said all must keep a watch on the election process.
她说所有人必须对选举过程进行监督。
In a speech after visiting a helicopter factory near Marseille earlier this month, he announced that the state would keep a closer watch on the strategy of any company in which it had a stake.
本月早些时候，萨科齐在造访了一家离马赛不远的直升机制造厂商之后发表了一次演讲，他说到国家将对问题公司的运行策略倍加关注。
In particular, smartphones and the applications that run on them generally keep a close watch on what users do.
尤为突出的是，智能手机与运行于手机中的应用程序通常都紧密地观察着用户的所作所为。

Well,I think it's that governments around the Gulf do actually keep a very close watch on their populations and on people coming in and out of their countries.

The rest are in the 10% to 13% range, so keep a watch on them, since they may become buys long before the next issue of Income Securities Investor.
FORBES: Magazine Article
It is right for the government to keep a watch on colleges and universities to ensure that they are not being used as conduits for workers pretending to be students.
ECONOMIST: British universities
The takeaway from this true and sad story is that we all need to keep a close watch on a 90 year old like George with memory problems.
FORBES: The Case of the Missing Cash