The deal would have reduced competition in the commuter-aircraft market.这项协议原本会减少通勤航班市场的竞争。Her challenge reduced them to silence.她的质问让他们哑口无言。They were reduced to mendicancy.他们沦落成了乞丐.Heavy overheads reduced his profits.经费...
In land animals, saliva contains mucus, and provides lubrication for food in the alimentary canal.陆上动物的唾液内有粘液, 并对消化道内的食物起着润滑作用.In metal lubrication two distinct regions are recognized: boundary and hydrodynamic.在金属的润滑作用中...