两个队都因队员受伤而实力大减.用英语怎么说？

两个队都因队员受伤而实力大减.

Both teams were severely depleted by injuries.

both

adj. 二者，两者都；pron. 二者；adv. 二者，二者都；conj. 不仅…而且…，…和…都；

例句
The gym can be used by both able-bodied and disabled people.
这家健身房健全和残障人士都可使用。

teams

n. 队，组( team的名词复数 )；v. （与某人）一起工作( team的第三人称单数 )，合作，（与某人）结成一队；

例句
The teams have that extra bite when they are playing against their neighbours...
这几支队伍与其邻近地区队伍交手时锐气更盛。

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。

severely

adv. 严格地，严重地，严厉地，严肃地；

例句
The accident left the boy severely brain-damaged and almost totally reliant on others.
那次事故使这个男孩脑部严重受损，生活几乎完全依赖别人。

depleted

adj. 废弃的；v. <正>使大大的减少，使空虚( deplete的过去式和过去分词 )，耗尽，使枯竭；

例句
They fired in long bursts, which depleted their ammunition...
他们长时间开火，耗尽了弹药。

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

injuries

n. 伤害，损害( injury的名词复数 )，受伤处；

例句
The houses were set afire but there were only minor injuries to seven personnel...
房子着火了，但是只有7位职员受轻伤。