羸弱用英语怎么说？

羸弱

例句

• Cannon rolled past , the drivers flaying the thin mules with lengths of rawhide. 后面是辚辚滚动的炮车,赶车的用长长的皮鞭狠狠抽打着羸弱的骡子.
• But the truly frightening thing was the emaciation of his body. 但是最吓人的还是身体羸弱的程度.