他们极度贫困。用英语怎么说？

他们极度贫困。

They were miserably poor.

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

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。

miserably

adv. 痛苦地，悲惨地，糟糕地，极度地；

例句
Enclothe a face miserably no matter China, comparative inside limits of alive still bound big.
贫困覆盖面不论中国, 还是在世界范围内都相当大.

poor

adj. 贫穷的，贫乏的，令人怜悯的，可怜的，匮乏的，低劣的；n. the poor 贫困者，穷人；

例句
I suppose the shock had addled his poor old brain.
我估摸这个打击已经把他那可怜的脑袋瓜搞糊涂了。