小心和当心英文翻译是一样的。都是Careful;Wacthyourback;Takeiteasy;BeCarfull

【例句】一、当心，那条狗会咬人。Becareful,thatdogbites.-《21世纪大英汉词典》二、你说话做事都要当心。Youmustbecarefulastowhatyousayordo.-《新英汉大辞典》三、当心，栗刺会刺你手指的。Becareful—thechestnutburscanprickleyourfingers.-《21世纪大英汉词典》。