海底 + Noun
海底 (hǎidǐ) means the seabed or ocean floor. It is composed of 海 (sea) and 底 (bottom). It often appears as a modifier before nouns, such as 海底火山 (undersea volcano) or 海底隧道 (undersea tunnel).
科学家在海底发现了很多奇怪的生物。
Kēxuéjiā zài hǎidǐ fāxiàn le hěn duō qíguài de shēngwù.
Scientists discovered many strange creatures on the ocean floor.
这条海底隧道连接了两个城市。
Zhè tiáo hǎidǐ suìdào liánjiē le liǎng gè chéngshì.
This undersea tunnel connects two cities.
海底的世界比我们想象的要丰富得多。
Hǎidǐ de shìjiè bǐ wǒmen xiǎngxiàng de yào fēngfù de duō.
The underwater world is far richer than we imagine.