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.
动物的心脏通过交替收缩和扩张保持血液循环。
An animal's heart keeps up the circulation of the blood by alternately contracting and expanding.
结论氟乙酰胺对心脏有明显的损害，而且可以引起心脏电交替。
Conclusion Fluoroacetamide may cause obvious heart damage, and also heart electrical alternation.
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