phr. at arm's length 1. 以一臂之远；在伸手可及处
hold a picture at arm'slength 伸直手臂拿着图片(观看)
2. 相当疏远地；保持一定距离地
He holds the world at arm's length. 他对周围的人不即不离。
She kept him at arm's length during the first few weeks. 最初几星期她同他保持一定距离。
The relationship between the two countries has always been at arm's length. 两国关系一直相当冷淡。
3. (交易)双方均不受对方控制地
The final price will be a fair one, calculated at arm'slength. 最后的价格以正常交易关系核算，将是公道的。
at full length 1. 全身伸展地
The boys lay at full length on the sand after their bathe. 男孩子们游泳后摊手摊脚地躺在沙滩上。
2. 详尽地，无删节地
at great length 详尽地；长久的
at length 1. 最终，终于
At length, we began to understand what he wanted. 最后，我们总算弄明白他要的是什么。
2. 详尽地
He talked at length about his work and his family. 他详谈他的工作和家庭。
3. 长久地，啰唆地
She spoke at length about nothing at all. 她啰唆半天，根本没说出什么名堂。
go (to) any length(s) (或 all lengths) 〈口〉(为达到目的)不遗余力；无所顾忌
She'll go to any lengths to get promotion. 为了要提升，她什么都干得出来。
go to great lengths = go (to) any length(s)
go (to) the length of1. 一直走到
2. 达到…的地步
He went to the length of perjuring for her sake. 他为了她的缘故甚至作伪证。
know (或 find, get, have, take) the length of sb.'s foot 深知某人，对某人有准确的估计；发现某人的弱点；摸透某人的特点(以便加以控制)
I know the length of his foot but he does not know mine. 我完全了解他的情况，可是他对我一无所知。
measure one's length 全身跌倒(或躺)在地上
He slipped on the wet grass and measured his length in the mud. 他踩上湿草滑了一跤，全身躺在烂泥上。
sb.'s length of days 某人的寿命
the length and breadth 整个地区，到处
The tourist has travelled the length and breadth of the country. 旅游者走遍了那个国家。
The prisoner was in the stoutest castle in all the length and breadth of England. 囚犯被关在全英格兰最坚固的城堡之中。