B1 [ C or U ] the measurement of something from end to end or along its longest side长,长度
[ C ] a piece of something such as string or pipe条,根
[ C ] a unit used in describing the distance by which a horse or boat wins a race, equal to the measurement from one end of the horse or boat to the other(马的)身位;船身
[ C ] the distance from one end of a swimming pool to the other游泳池的长度,泳程
More examples
The impact of the crash reduced the car to a third of its original length.
Application forms vary greatly in layout and length.
The metre is the standard unit for measuring length in the SI system.
The mountains stretch the entire length of the country.
Dad, I swam a whole length of the pool underwater !
B2 [ C ] the amount of time something lasts花费的时间
C1 [ C or U ] the amount of writing in a book or document(书籍或文件的)篇幅
C2 for a long time长久地,长时间地
formal If something happens at length, it happens after a long period of time.终于,最终
More examples
Application forms vary greatly in layout and length.
The children are too young for a movie of that length.
How can it take that length of time to get dressed?
I can't believe the length of time they spend chatting!
I asked him to cut the length of his speech.
long enough to reach the stated place长及…的,长度达到…的
of the stated amount of time…时长的
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