小心和当心英文翻译是一样的。都是 Careful ; Wacth your back ; Take it easy ; Be Carfull

【例句】一、当心，那条狗会咬人。Be careful,that dog bites. -《21世纪大英汉词典》二、你说话做事都要当心。You must be careful as to what you say or do. -《新英汉大辞典》三、当心，栗刺会刺你手指的。Be careful—the chestnut burs can prickle your fingers. -《21世纪大英汉词典》。