a system of ropes and pulleys绳索滑轮系统Levers and pulleys are simple machines.杠杆和滑轮是简单机械.Among them were rickshaw pulleys, peddlers, policemen and servants.这些人有的拉车,有的做小买卖, 有的当巡警,有的当仆人....
探讨了一种三支承导轨跨距的优化计算方法.The span of the three - brace guiding rail is optionally calculated.各自的跨距拥有十二个手指宽度.Each span has twelve finger - breadths.并研究了三种失稳与砌体梁的跨距 、 高度及其承受载荷的关系.Their relationships between instability of stack...
Doris Brown closed her eyes and lapsed into sleep.多丽丝·布朗闭上眼睛，安然入睡。She lapsed into a little girl voice to deliver a nursery rhyme.她改用童声唱起童谣来。She calls herself a lapsed Catholic.她称自己已不再信仰天主教。...
他对于法国、德国和荷兰的文学了如指掌。He was well acquainted with the literature of France, Germany and Holland.荷兰烤箱能够做的食物之多会让你感到惊奇。You'll be amazed at the culinary creations possible in a Dutch oven.一份荷兰报纸拍到了总统形单影只地在雨中等待的照片。A Dutch n...