We can build up the speed gradually and safely.我们可以逐渐稳妥地提高速度。Deposits of plaque build up between the tooth and the gum.牙齿和牙龈之间会滋生牙斑。Exercise in pregnancy can build up your strength and suppleness.孕期锻炼身体可以增强体力和柔韧性。...
Well, maybe I stumped you on that one.好吧，也许我在那件事上使你为难了。The Marshal stepped over the vacuum-cleaner and stumped out of the room.元帅迈过真空吸尘器，脚步沉重地走出了房间。John is stumped by an unexpected question...一个意想不到的问题把约翰难住了。Will you hel...
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...
真是太没头脑了，我要告诉他我很生气。How very thoughtless. I'll give him a piece of my mind.简老是惹她生气，她有时就拿我出气。Jane's always annoying her and she takes it out on me sometimes.“这根本不关你的事，”他生气地说。"I can't see it's any of your...