He kept bouncing up and down like a yo-yo .他像个悠悠球似的蹦蹦跳跳。Don't talk to him, he is a real yo - yo.不要跟他说话, 他真是个摇摆不定的呆瓜.My emotions went up and down scale a yo - yo.当时我的情绪就好象悠悠轮一样忽上忽下....
She wanted him to act as an intermediary in the dispute with Moscow.她想让他充当中间人来调解与莫斯科的争端。Any person abruptly starved shows alterations in intermediary metabolism of protein, carbohydrate, and fat.任何人突然遭到饥饿,就会出现蛋白质 、 碳水化合物...
这张专辑真棒，新颖、有趣且富于变化。This is a fabulous album. It's fresh, varied, fun.他的手势富于表现力。He moved his hands expressively.他贫于金钱, 但富于学问.He is poor in money, but rich in knowledge....