Only drink bottled water and check the seal isn't broken.
只喝瓶装水，并且要看封口开了没有。
《牛津词典》
2
In the laboratory, when the seal dives below the surface of the water and stops breathing, its heart beats 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。
3
A seal popped out of the water below the ship and greeted them on the last day of their stay.