The undulating planes of the countryside provide relief from the hard horizontals and verticals of the urban scene.乡村起伏不平的地势使人们摆脱了城市刻板的横平竖直景象。She had an undulating , but oftentimes a sharp and irregular movement.她行踪飘忽, 时...
在他们最近引进的东西里面有两样给我留下了非常深刻的印象。There are two among their recent introductions that have greatly impressed me.我们1980年引进的系统有了很大改进。The system we introduced in 1980 has been a great improvement.这台机器是在1960年被试验性地引进的.This machine ...