He set it on the hard earth floor and knelt by it, pretending to examine the ground closely.

他把灯放在硬土地上，跪下来凑近地面，好像在查看什么。

youdao

They lived in an area about the size of a tennis court with an earth floor under tents and sheds.

他们住的地方约网球场大小，在一片泥地上搭着帐篷和棚屋。

youdao

I would like to slime diversion of groundwater should be followed, and slowly move to the pyramid, following a chance, it springs from the ground into the tomb of the rammed earth floor.

我想这颗黏菌应该是跟着地下水的改道，慢慢移动到金字塔下面的，一个偶然的机会，它从地泉进入到了墓室的夯土层。

youdao

The huge Saturn rocket, as tall as a thirty-six-floor building, was the heaviest thing ever to leave Earth.

VOA: special.2009.07.08

On Earth, sea-floor spreading is fuelled by molten rock upwelling from deep inside the Earth.

BBC: Enceladus has 'spreading surface'

Over the weekend, it was also reported that Japanese experts have found a large deposit of rare earth minerals on the floor of the Pacific Ocean.

FORBES: A New Trend for Rare Earth Stocks?

The high prices fetched for copper, gold and rare-earth minerals are leading to a surge in interest in mining the ocean floor.

BBC: UK Seabed Resources joins deep-ocean mineral-mining rush