短語(yǔ)詞組短語(yǔ)Teaching Idea Drop Behind 教學(xué)觀念落后drop behind the back 背后脫落;杠鈴背后脫落drop behind fall behind 落后drop behind the ranks 落在隊(duì)伍的后面;落伍drop behind others 落在別人后面drop behind the other runners 落在其他跑步者的后面drop behind the other runner 落在其他跑步者的后面Fall behind or drop 逆水行舟不進(jìn)則退;逆水行舟 返回 drop behind