如果可的松无效，我恐怕只能动手术了。If the cortisone doesn't take, I may have to have surgery.令人震惊的是，这种既无效又危险的手术直到20世纪30年代才被废止。Shockingly, this useless and dangerous surgery did not end until the 1930s.一份官方法令宣布在首都举行的投票无效。An official ...
He did whatever he could to ease their travail.他为减轻他们的辛劳做了力所能及的一切。Mothers know the travail of giving birth to a child.母亲们了解分娩时的痛苦.He gained the medal through his painful travail.他通过艰辛的努力获得了奖牌....