當壓強趨近于零時, 分子的碰撞就停止了.For the pressure to become zero , molecular bombardment must cease.低的基本壓強也是保持表面清潔所要求的.Low base pressure is also a requirement to keep the surface clean.壓強的不相等導(dǎo)致氣體運動.Pressure inequalities generate gas ...
moral laxity道德敗壞The newspapers accused local police of laxity in dealing with gamblers.報紙指責當?shù)鼐煸趯Ω顿€徒方面執(zhí)法不嚴.The laxity of export control authorities has made a significant contribution to the problem.出口控制部門工作懈怠，是造成此問題的重要原...
He tapped his feet, hummed tunes and jiggled about.他腳下打著拍子，嘴里哼著調(diào)子，身子晃來晃去的。He started the car, which hummed smoothly.他發(fā)動了汽車，車發(fā)出平穩(wěn)的嗡嗡聲。The birds sang, the bees hummed.鳥兒叫，蜂兒鳴。...