The "flywheel" battery, it is said, could power an electric car for 600 miles on a single charge.据说“飞轮”电池充电一次就能驱动电动汽车行驶600英里。Flywheel is an important executive component of satellite attitude control system.飞轮是卫星姿态控制系统的关...
这些崎岖不平的路很快就把摩托车轮胎磨平了.These rough roads soon wore the tread of motorcycle tires off.抽烟斗的人用牙齿咬住烟斗，有时会把齿尖磨平。Pipe smokers sometimes wear down the tips of their teeth where they grip their pipes.如果马掌磨薄或磨平，就需要换新马掌了。Your horse ...