We knelt (down) on the ground to examine the tracks.

我们跪在地上察看足迹。

《牛津词典》

How can I see down to the ground?

我怎么能看到地面呢？

youdao

We slid down the roof and dropped to the ground.

我们从屋顶滑下来，掉到地上。

《柯林斯英汉双解大词典》

Someone with both feet on the ground may not be as open and easy to deal with as someone who is down to earth.

VOA: special.2009.03.08

Then he flung outward, feet first, with a swish, Kicking his way down through the air to the ground.

然后，纵身一跳，他两脚先伸出去，在空中乱踢乱舞，于是飕的一声，降落到地面。

耶鲁公开课 - 现代诗歌课程节选

The person who is down to earth usually has both feet on the ground.

VOA: special.2009.03.08

Police said experts fear the rhino's horn could be ground down to use in black-market Chinese medicine.

BBC: Rhino head stolen from Essex auctioneer

Some concrete lumps were ground down to make the curbs more forgiving.

BBC: Alonso edges Hamilton in practice

May 1999 was near the peak and the market ground down to just a hair above the May 1997 level by Sept. 2002 and ultimately breached the May 1997 level in early 2009.

FORBES: When The Dow Doubles, Returns Tend To Stay Meaty For Years To Come