As in the ocean, the diver may disappear there.

就象在大泽里一样，潜水员也能在下水道里失踪。

youdao

I mean it's the color of night, it's the color of the ocean and as a scuba diver I've spent a lot of time looking into the deep blue, the pelagic blue.

这是夜晚的颜色，是大海的颜色，我喜欢潜水，常花许多时间观察海洋中的深蓝色，这是深海的颜色。

youdao

While exploring the ocean aboard his high-speed scooter sub, the deep-sea diver has found one of the treasure keys leading to the sunken city of Atlantis!

他在探索搭乘高速机车分远洋，深海潜水员已经发现了宝藏导致亚特兰蒂斯沉没的城市的关键之一！

youdao

Walsh spent eight years in academia. The retired Navy captain continued to pursue his passions as a scuba diver, private pilot and explorer, participating in dozens ocean dives and expeditions to the polar regions.

VOA: standard.2010.06.21

The first one focused on helping ocean bound private boats remove barnacles from their hulls by sending a diver into the water below the boat with a high pressure hose.

FORBES: Barnacles, Diamonds and Cows: 5 Startup Failures--My 5 Lessons Learned