Definition: when you spend some time swimming under water Level: B2
该中心还提供夜间潜水，强烈推荐。
The centre also offers night ___dives, which are highly recommended.
我们在游泳池里练习了一些训练潜水。
We practiced some training ___dives in the swimming pool.
在潜水课程中，每个学生必须完成几次开放水域潜水。
During the scuba course, each student must complete several open-water ___dives.
