Death valley is this desert plain, a dry lake bed in California surrounded by mountains and on the desert floor these huge rocks, some of them hundreds of pounds.

死亡谷是一片沙漠平原，是加利福尼亚的一个干涸的湖床，四周群山环绕，在沙漠的地面上有巨大的岩石，有些重达数百磅。

youdao

The horses thundered across the valley floor.

马群轰隆隆地从谷底奔跑而过。

《柯林斯英汉双解大词典》

She scavenges along the rough mountain roads for water while the giant lake created by the dam lies untouched a few hundred meters below on the valley floor.

她为了取水沿途清扫着高低不平的山路，因为大坝建立了一个大湖位于未被触及的几百米以下的谷底。

youdao

They lift their eyes to the tall rock walls that rise hundreds of meters up from the floor of the valley.

VOA: special.2010.07.05

They said a thin valley in the Atlantic Ocean was a place where the ocean floor splits.

VOA: special.2010.01.12

These mountains rise directly from the floor of the valley.

VOA: special.2009.02.16

Five years ago they were forced to give up their rice fields on the valley floor.

BBC: White Horse Village

We follow irrigation channels out of the valley floor, up towards the mountain.

BBC: In search of a lost Moroccan oasis

Cakebread has 112 acres of prime Napa Valley floor vineyard along Route 29, and 400 other acres in prime Napa locations.

FORBES: Napa Valley Comes To New York For A Pizza-Making Party