Diamonds have extreme resistance to abrasion.钻石极抗磨损.Erosion of pipes and vessels from abrasion by particles can be serious.由于固体颗粒的磨蚀作用,管子和容器的磨损严重.Abrasion also abets wind erosion.磨损作用也助长了风的侵蚀....
rotor blades on a helicopter直升机的旋翼叶片A rotor from the engine makes the wheels of the car turn.发动机的轮子使车轮转动.It is best to allow the rotor to rotate freely.最好让转子自由旋转....
The operation is carried out under a general anaesthetic.该手术是在全身麻醉情况下实施的。The formalization of co-operation between the republics would produce progress.正式确立合作关系将会促进共和国之间合作的顺利进展。The air rescue operation has now been scale...