midpoint/ˈmɪd.pɔɪnt/名词（线等的）中点The driveway is 20 metres long, so the midpoint must be at 10 metres.这条车道有20米长，所以中点一定在10米处。（时间的）一半，中间时刻the midpoint of the football season足球赛季过半的时候想跟读，去练习
