当压强趋近于零时, 分子的碰撞就停止了.For the pressure to become zero , molecular bombardment must cease.低的基本压强也是保持表面清洁所要求的.Low base pressure is also a requirement to keep the surface clean.压强的不相等导致气体运动.Pressure inequalities generate gas ...
moral laxity道德败坏The newspapers accused local police of laxity in dealing with gamblers.报纸指责当地警察在对付赌徒方面执法不严.The laxity of export control authorities has made a significant contribution to the problem.出口控制部门工作懈怠，是造成此问题的重要原...
He tapped his feet, hummed tunes and jiggled about.他脚下打着拍子，嘴里哼着调子，身子晃来晃去的。He started the car, which hummed smoothly.他发动了汽车，车发出平稳的嗡嗡声。The birds sang, the bees hummed.鸟儿叫，蜂儿鸣。...