watch out for 跟 be Careful of 有什么相同跟不同...?...

Watch out for 密切注视，有“看”的意思

例：Watch out for cars. 当心车辆

be careful of 珍重，注意，留意

例： Be careful of his feelings. 注意他的感觉。

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另外，举几个watch out的例子希望你能理解如何用的：

watch out for someone/something

1. to feel responsibility for someone or something. 对某人某市感到负责任。
例子：Carol's father made me promise I'd watch out for her and make sure she had whatever she needed.

2. to be aware of someone or something. 小心某人某事
例子：I used to tell everyone, “Watch out for this girl. She's going to be a great tennis player one day.”

3. to be careful in order to avoid a problem. 小心而避免麻烦
例子：You've got to watch out for viruses when downloading files to your computer. Watch out for that dog — he's not very friendly.

be careful of:

vt. 注意

例句与用法:
1. Be careful of your health.
注意你的健康；请多保重。

2. Be careful of that chair; it\'s