我认为幽默是人生的上好润滑剂。I think humor is a great lubricant for life.绝大多数机械装置都需要用油作为润滑剂。Most mechanical devices require oil as a lubricant.把润滑剂涂在轮子上使它转起来更零活一些。You put lubricant on a wheel to make it turn more easily....
珠宝商在他的店铺后面有一间作坊。The jeweller has a workroom at the back of his shop.珠宝商宣称这金刚石是真的.The jeweller pronounced the diamond to be genuine.珠宝商的展示使那些钻石更为醒目.The jeweler's display showed the diamonds to advantage....