蛙人

例句：

1. 1. The team's newcoach is a former submarine swimmer.
   该队的新教练是前蛙泳运动员。
2. 2. The divers were performing underwaterstunts for the audience.
   潜水员们在水下为观众表演特技。
3. 3. Thesubmarine was used to explore thedeep sea.
   潜艇被用来探索深海。