交替训练可以训练你的心脏和肌肉更有效率的利用氧气。
Interval training teaches the heart and muscles to use oxygen more efficiently.
慢性酗酒可能使心脏搏动的效率下降，并引起心肌病。
Chronic alcohol abuse may cause your heart to beat less effectively and can lead to cardiomyopathy.
同时，你的心脏变得更强壮，能更有效率地输送血液。
At the same time, your heart also becomes stronger and more efficient at pumping blood.
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