They find it difficult to pump themselves up for the games.他们感到要为自己加油打气，自信满满地去打比赛并不容易。Age diminishes the heart's ability to pump harder and faster under exertion.随着年龄的增加，人在消耗体力时心脏的输血能力和输血速度会有所减弱。He ran in every five...
Fitment of pharmacy - adding system ( including purchasing of proportional pump and tubing )加药系统安装 ( 包括定量泵和配管等购买 )The pump analogizes with the human heart.水泵被用来比拟人的心脏.What if I operate my pump at a very low level for sum...