He examined fossilized remains in a piece of gypsum found on the bottom of the Mediterranean Sea.

VOA: special.2010.05.25

He conjures the indecorous image of the dead Lycidas under the whelming tide visiting the bottom of the monstrous sea.

他想象死去的利西达斯,在排山倒海的浪潮覆盖下拜访尽是妖怪的海底。

耶鲁公开课 - 弥尔顿课程节选

Taq stands for thermos aquaticus, it's a marine micro-organism that lives near these hydrothermal events in the bottom of the sea and they live under very high temperatures and pressures all the time.

aq是"水生栖热菌"的简称,那是一种生活在靠近深海热液活动区的,海底微生物,它们长期生活在高温高压的环境中

耶鲁公开课 - 生物医学工程探索课程节选

Scientists believe strong earthquakes forced the bottom of the sea to rise above the water.

VOA: special.2009.01.07

The area then was at the bottom of an ancient sea.

VOA: special.2009.01.07