When we barbecue, we are often entertaining family or friends. This distraction can lead to a fire hazard if you do not keep close watch on the barbecue as the fire burns.

我们做烧烤通常是为了招待家人或者朋友，所以期间很容易分心，这样就会留下安全隐患。

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Some use them to keep a close watch on the demand for their line of work or gather information on compensation to arm themselves when negotiating for a raise.

有些人用它来密切关注自己所在行业的需求情况，或者收集有关薪酬的信息，以便在加薪谈判时为自己做好准备。

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Keep a close watch on the enemy's movements.

密切注意敌人动向。

《新英汉大辞典》

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.

VOA: standard.2010.08.11

But are signs effective at reminding distracted parents to keep a close watch on their children?

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Montreal referee Yves Lavigne then moved over to keep a close watch on the challenger.

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Like any shift, it is important to keep a close watch on how it impacts your small business.

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