In the laboratory, when the seal dives below the surface of the water and stops breathing, its heartbeats more slowly, requiring less oxygen, and its arteries become constricted.
在实验室里，当海豹潜入到水面以下并停止呼吸时，它的心脏跳动得更慢，需要的氧气更少，动脉也会收缩。
2
Her body is not at the right temperature and her heartbeats very weakly.
她的体温不正常，心脏跳得也很弱。
3
The average human heartbeats around 100,000 times per day.