lag1/læg; læɡ/v lagged , lagging lag behind (sb)phr v to move or develop more slowly than others 落在(某人)后面﹔落后(于): She stopped to wait for Ian who was lagging behind. 她停下来等落在后面的伊恩。
lag2n [C] a delay between two events [ time lag ]〔两个事件之间的〕时间差﹐时间间隔JET LAG