他比你聪明千百倍: more wit in his little finger than in your whole body
警惕: be on guard against; watch out for; be vigilant; be on the alert 短语和例子保持高度警惕 maintain sharp vigilance; 百倍警惕 exercise the highest vigilance; 放松警惕 relax vigilance; 丧失警惕 drop one's guard; be
