She had to force herself to stand her ground when she heard someone approaching.

听到有人走近时，她得强迫自己不要退却。

《柯林斯英汉双解大词典》

Land mines are small bombs hidden in the ground and designed to explode when someone steps on them.

地雷是隐藏在地下的小炸弹，当有人踩到它们时，就会爆炸。

youdao

It is not easy to hold your ground in front of someone with a gun.

面对持枪者而不退缩并不容易。

《牛津词典》

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

When the ball carrier is on the ground, someone on the defense must at least touch him so he's ruled down.

NPR: A Gay Football Player, 'Alone in the Trenches'

No long faces standing around in the rain, staring down into a hole in the ground while someone drones on about how wonderful I was.

BBC: Quentin Crisp dies

They allegedly handed off money in a "brush pass, " exchanging identical orange bags at a railroad station in Queens, burying money in the ground for someone else to dig up two years later, and posting hidden notes on websites for the "Center" headquarters for the S.V.

WSJ: Russian Spies: Russia, America Agree to Trade Agents