But most scientists call it tonic immobility, or TI.

但大多数科学家称之为强直不动， 或 TI。

But in fact the float exploits a quirk in shark biology, exhausting it so much, it enters a state known as tonic immobility.

事实上，是木浮利用了鲨鱼生理上的特点使它精疲力尽，进入了紧张性僵直的状态。