1. Expression：keep one’s eyes peeled

Explanation：To remain vigilant or watchful (for something or someone). （保持警惕，密切注意）

Example：They should be arriving any minute so keep your eyes peeled.

他们随时都可能到达，所以要睁大眼睛。

Keep your eye peeled for a birthday gift we could give your mother.

留意一下我们给你妈妈的生日礼物。

Tell everyone to keep their eyes peeled for the health inspector. We heard she'll be doing a surprise inspection someday soon.

告诉每个人都要密切注意卫生检查员。我们听说她很快就会来个突击检查。

Joe, I'm going to have to drill this lock out of the door for us to get in. The drill will make some noise so keep your eyes peeled for the cops.

Joe，我得把这门上的锁钻下来，这样我们才能进去。我钻的时候会有声音，所以你得睁大眼睛，注意看有没有警察。

2. Expression：keep one’s eyes skinned

Explanation：To remain vigilant or watchful (for someone or something). （保持警惕，密切注意）

Example：Keep your eyes skinned, and if you see anything suspicious, call the police immediately.

保持警惕，如发现任何可疑情况，立刻报警。

The police kept his eyes skinned for the movements of the suspicious character carefully.

警察密切注意着那个可疑人物的行动。

A policeman has to keep his eyes skinned all the time he's on duty.

警察在执勤时必须时刻保持警惕。

The beltway is very dangerous to drive on, especially during the rush hour. So be sure to keep your eyes skinned when you change lanes to pass one of those big trucks they call eighteen wheelers.

在这条高速公路上开车是非常危险的，特别是上下班交通最忙的时候。所以当你要改换车道要超过那种十八个轮子大卡车的时候，一定要十分警觉。

3. Expression：keep one’s eyes polished

Explanation：To remain vigilant or watchful (for something or someone). （保持警惕，密切注意，擦亮眼睛）

Example：They kept their eyes polished in their struggle against terrorists.

在与反恐怖分子的斗争中他们始终保持警惕。

Our friends are not so trustworthy that let's all keep our eyes polished.

咱们的那些朋友可并不那么老实可靠，因此咱们大家还得保持警惕。（教父）