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。...
如果你等待，发生的只有变老。If you wait, all that happens is that you get older.热爱生活，生活也会厚爱你。If you love life, life will love you back.不要等待好事降临，你要向幸福进发。Do not wait for good things to happen to you. You need to walk towards happiness....