Three prisoners were sharing one small cell 3 metres by 2 metres.是什么意思？

Three prisoners were sharing one small cell 3 metres by 2 metres.

3个囚犯关在一个3米长2米宽的小牢房里。

three

num. 三，三个，第三（章，页等）；n. 三岁，三个人[东西]，三，三个；adj. 三的，三个的；

例句
Outsiders who wed islanders are given only three years' right of abode at first.
岛外的人和岛民结婚之初只能获得三年的居住权。

prisoners

n. 囚徒( prisoner的名词复数 )，俘虏，被夺去自由的人[动物]等；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

sharing

n. 分配，均分，共价，共享；

例句
Three prisoners were sharing one small cell 3 metres by 2 metres.
3个囚犯关在一个3米长2米宽的小牢房里。

one

num. （数字）一，一个，（基数）一，第一；n. 一个人，一点钟，一体，独一；pron. 一个人，任何人，本人，人家，东西；adj. 某一个的，一体的，一方的；

例句
No one ever questioned her capability.
从来没有人质疑她的能力。

small

adj. 小的，难为情的，低级的，卑劣的，细微的，微弱的；adv. 小小地，卑鄙地；n. 细小部分，腰部，琐碎东西，身份低的人，矮小的人；

例句
Car manufacturers are already producing small numbers of electric vehicles to test customer acceptance...
汽车制造商们已经开始生产少量的电动车辆以测试顾客的接受程度。

cell

n. <生>细胞，小牢房，电池，<诗>墓穴；vi. 住在牢房或小室中；vt. 囚禁；

例句
DNA is the genetic material inside every cell that carries the blueprints for everything from hair color to the risk of cancer.
脱氧核糖核酸是存在于每个细胞内的基因物质，它承载从头发颜色到致癌风险等各种遗传型板。

metres

n. 米( metre的名词复数 )，（诗的）格律，用于竞赛名称 metres；

例句
I saw a man in a blue jacket thirty metres ahead of me...
我看见在我前面30米处有一个身穿蓝色夹克的男人。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品