freediving
noun [ U ] (also free-diving) uk/ˈfriː.daɪ.vɪŋ/ us/ˈfriː.daɪ.vɪŋ/
（不使用呼吸设备的）自由下潜，自由潜水
the activity or sport of swimming as deep as you can under water without using breathing equipment
In freediving the diver descends with no more than a lung full of air, to depths of up to 100 metres. 在自由潜水过程中，潜水员可以仅仅凭借自己肺里的空气下潜到100米深的水下。
Deaths in competition free-diving are rare but happen occasionally. 自由潜水比赛中死亡很少见，但偶尔也会发生。
- More examples
- As a sport, freediving was the relatively recent creation of a Frenchman, Jacques Mayol, and an Italian, Enzo Majorca.
- Welcome to the masochistic world of freediving - the riskiest of all the danger-based extreme sports.
- He is making an attempt on the world freediving record.
- We gear up with equipment specially designed for free-diving.