1、 length中文意思是:长;长度;(持续)时间的长短;(书或文件等的)篇幅;(电影的)片长。2、例句:(1)This room is twice the length of the kitchen.这个房间的长度是厨房的两倍。(2)Did you see the length of his hair?你看见他头发有多长吗?(3)Each class is 45 minutes in length .每一节课为45分钟。