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.