get／have the jump on
get ahead of；start before others； have an advantage over 占优势；领先；胜过
Mr．Lin got the jump on us by seeing the manager before we did．林先生捷足先登在我们前面会见了经理。
Don't let the other students get the jump on you at the beginning of the race．比赛一开始就不要让其他学生占你的优势。