lengths
n. [计量]长度，指距离或时间（length 的复数）
例句
Copper pipe is sold in lengths.
铜管按长度出售。
《牛津词典》
He swims 50 lengths a day.
他每天游50个游泳池那么长的距离。
The horse won by two clear lengths.
那匹马以整整领先两个马身的优势获胜。
