密切关注：指专注地观察、监视某人或某物，以确保安全或了解情况。
留意：指注意、留心某人或某物的动态或变化。
follow with the eyes or the mind
同义词： watch / observe / follow / watch over
留神
... keep down 控制，抑制，遏制（使不上升） keep an eye on 留意，照看，照料，照管 wear out 穿破，磨破，用坏；（使）疲劳（乏），（使）厌倦；（使）耗尽 ...
in the twinkling of an eye一眨眼，转眼间 keep an eye on（=keep a watch on）照看，监视 in the eyes of in one's eyes （ = in the judgment of ）在某人看来，在某人眼里 ..
... catch sbs eye被某人看到，引起某人注意 keep an eye on留神，照看，密切注意 make aface做鬼脸 ...
... it's alie in every sense of word.这是不折不扣 菲鱼遭近年首场失利新动作亮相50米自由泳第8的谎言。 keep an eye on提高警惕 kill time打发时间 ...
照看；留意；密切注视
All you can do to prevent potato blight is keep an eye on your crops.
为预防马铃薯枯萎病你惟一能做的就是留意你的庄稼。
We've asked the neighbours to keep an eye on the house for us while we are away.
我们已请邻居在我们离开时帮我们照看一下房子。
Please keep an eye on our web!
请留意我们的网站！
The next day, at their school, the woman asks the man to keep an eye on, or watch the young students in her class while she is out of the classroom.
VOA : special.2009.09.06
Authorities here depend on the public to keep an eye out for unusual packages or passengers.
VOA : standard.2010.04.01
They wanted to keep an eye on the Muslims in the south on the border with Malaysia.
And keep an eye on John Edwards, a compelling candidate who is riding the populist wave.
Amazon.de seems to be the place to keep an eye on for Skylanders exclusive news.
FORBES: Would Skylanders Toys Succeed Without The Video-game?