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

This makes carbonate sediments on the floor of the ocean that are subducted back into the Earth though plate tectonics.

这样在海洋表面的碳酸盐的沉积物通过板块构造返回地球中。

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