shift
问题描述：
shift
shift gear American English (=change what you are doing)
It's hard to shift gear when you come home after a busy day at work.
答
原意是“换挡”,就是汽车的排挡.现在的引申义一般都是取“向上”的正面意思.shift gear 换挡,American English 美语,change what you are doing 改变你正在做的事（改变当前的状态）.It's hard to shift gear when y...