请问keep an eye on 是什么意思？

Keep an eye on
留意，照看
keep tabs on; keep an eye on; keep under surveillance.
看到；密切注视；保持监督。
Please keep an eye on the children.
请照看一下孩子们。
Please keep an eye on the baby for me.
请给我照看一下这婴孩。
Basking on the balcony, granny can still keep an eye on the children.
奶奶一面在阳台上晒太阳，一面还可以照看孩子们。
Then he has got to keep an eye on them.
然后，他应该对这些人的工作进行监督。
Because we always keep an eye on the East European market.
因为我们总是注意着东欧的市场。
Can you keep an eye on my suitcase for a moment.
你能给我照管一会儿手提箱吗。
Could you keep an eye on my suitcase for a moment?
你能给我照管一会儿手提箱吗？
Excuse me, but will you keep an eye on this baggage?
对不起，帮我看一下这个行李好吗？