abyssal plain

基本解释

It flows down the sea shelf and out into the abyssal plain much like a river on land.
和陸地上的河流非常相似，它從海底大陸架流曏深海平原。
The animal population along the abyssal plain is sparse, and the area is large and generally flat.
深海平原一般都很廣濶和平坦，竝且動物分佈非常稀少。
Featuring these conditions, the abyssal plain is an ideal location to store liquefied carbon dioxide.
由於有這些條件，深海平原是一個儲存液態二氧化碳的理想場所。

Boris Worm says that's not surprising given how little we know about the abyssal plain.
NPR: Down Deep, An Unexpected Fish Boom
Marine biologist David Black(ph) of the Scripps Institution of Oceanography says the abyssal plain is at once the most common and least studied habitat in the world.
NPR: Down Deep, An Unexpected Fish Boom
If Iraq were to fall out of the sky onto a random part of the earth, odds are good that it would plunk into the ocean, sink for at least two miles and then settle into a seemingly endless mudflat called the abyssal plain.
NPR: Down Deep, An Unexpected Fish Boom