The body must return identically to its original condition when the loads are released.当去掉载荷时,物体必须恢复到与原来完全一样的状态.The motion is periodic, which means it occurs identically over and over again.这个运动是周期的, 意即运动以同样的形式重复出现.The w...
A new system has been devised to control traffic in the city.控制城市交通的新系统已经设计出来。They devised a plan to rob a bank.他们策划抢劫银行.He has devised a process for making gold wires which neither corrode nor oxidise.他设计了一种能够避免腐蚀或氧化的金丝...