占优势: have the whip hand (of); be in a dominant position; dominant; gain [get; have] the upper hand; get [have] the edge on sb.; hold preponderance; prevailing 短语和例子占绝对优势 hold all the trumps; 上半
在攻击对方时必须袭其不意才能占上风: it is only by attacking the other side unprepared that we can stand in advantage