短語(yǔ)詞組短語(yǔ)be at the pains 盡力設(shè)法be at pains of 煞費(fèi)苦心be at pains stations 手忙腳亂be at pains to 下苦功be at the pains of 煞費(fèi)苦心 返回 be at pains