时间:2017-07-25 06:00:26166网络整理admin

Divers normally control their buoyancy manually, by adding to or releasing air from an inflatable jacket. If they get this wrong, they risk descending to a depth that can cause too much nitrogen to accumulate in their tissues, or rising so rapidly that potentially fatal nitrogen bubbles form in their blood. To help divers avoid this danger, researchers at the University of Auckland, New Zealand,