He vainly hope to travel round the world on foot.他梦想步行周游世界.The team captain vainly tried to rally his troops.队长试图振作部队的士气，但没有成功。He shouted after them, vainly trying to attract their attention.他在他们的后面高喊，想引起他们的注意，却是徒劳。I vai...
He hunted vainly through his pockets for a piece of paper.他翻遍口袋想找一张纸，结果没找到。The criminals vainly sought concealment from the searchlight.罪犯们徒劳地躲闪着探照灯光。He shouted after them, vainly trying to attract their attention.他在他们的后...