无效外语学习 -无效英文翻译

1. 因伤势过重，经医护人员抢救无效身亡用英语怎么说？

因伤势过重，经医护人员抢救无效身亡用英语怎么说？

因伤势过重，经医护人员抢救无效身亡 英文：He was killed by medical staff after being seriously injured。