有几种情况
一般情况下，小心相当于英语里的“careful”。eg. 我小心地走在路上（I walk on the street carefully），当心相当于英语里的“caution”eg. 当心地板滑(Caution, wet floor)。
如果表示警告，当心和小心可以等同
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May 13, 2011
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First notebook entry: Introducing myself
Hello, my name is Jiang Tingjun and my English name is Mike. I come from a beautiful city called Shaoguan, north of the Canton province. I'm a student majoring in English and I will graduate from Shaoguan University this coming July. I want to find a job that is related to the foreign trade. However, I found that what I have learnt form school is far form enough. So I hope to know someone who can help me to improve my spoken English on businese.
I am waiting for you.
