be careful of的用法和樣例：
例句
- Be careful of the dog; it sometimes bites people.
留心那條狗，有時(shí)候咬人。 - Be careful of that horse it often kicks.
小心那匹馬--它常尥蹶子。 - Be careful of that viper; he is dangerous.
小心那個(gè)陰險的人，他很危險。 - Be careful of that chair; it's a bit rocky.
當心，那椅子有些不穩。 - Be careful of your health.
注意你的健康; 請多保重。
