And if it is stronger, the heart rate will drop, so that the heart puts less effort into pumping the same amount of blood.
如果心脏更强壮了，心率就会下降，因此，在心脏向外输送与之前同等数量的血液时，它就不用再费那么大力气了。
BP oil company has begun pumping heavy mud into a blown-out well in the Gulf of Mexico in an effort to seal it off permanently.
能源公司BP开始对墨西哥湾破损油井注入大量泥浆，试图永久封堵这口漏油的油井。
Engineers were desperately pumping sea water into all three units at Fukushima in an effort to cool them down.
工程师们正竭力地向福岛核电站的3个反应堆注入海水，努力使它们降温。
Engineers were desperately pumping sea water into all three units at Fukushima in an effort to cool them down.
工程师们正竭力地向福岛核电站的3个反应堆注入海水，努力使它们降温。
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