The lift was at ground level, marked Whites Only.

电梯在一层，门上写着“仅供白人使用”。

In the center, at ground level, is a round pool of water.

在中心位置，地面上有一个圆形的水池。

At ground level, high levels of ozone can harm people's lungs and damage plants.

在地面上，高浓度的臭氧会损害人们的肺部和植物。

The trees were grown at ground level so that their roots could interconnect to make them stronger.

这些树从平面长起来，所以它们的根可以互相连接变得更加强壮。

Seen at ground level, the designs are a jumbled senseless mess.

从地面上看， 设计是一团乱七八糟的乱七八糟的东西。

But the ones that ate at ground level like Diplodocus had equally long necks and big bodies.

但是那些像梁龙一样在地面上进食的动物有着同样长的脖子和巨大的身体。

VOICE OVER: As well as monitoring the air, the flyers could cover a wide area at ground level.

画外音：除了监视空气外，传单还可以覆盖地面上的广阔区域。

At ground level, there are 86 colonnaded openings from where the visitor descends 170 steps to the deepest water source.

在地面层，有 86 个柱廊开口，游客可以从这里下行 170 级台阶到达最深的水源。

From the air, one sees a green sea of dense jungle, but at ground level, the tropical forest appears very thin.

从空中看，茂密的丛林是一片绿色的海洋， 但在地面上，热带森林显得非常稀疏。

The reason that high buildings make it windier at ground level is that, as the wind goes higher and higher, it goes faster and faster.

之所以高楼的底层风力更大是因为随着风向增高，风速会越来越快。

The explosion had left a hole more than forty miles across — much too huge to be seen from anywhere at ground level.

爆炸留下了一个直径超过四十英里的洞——大到从地面的任何地方都看不到。

Back at ground level, Blanchard explains that physical conditioning is just one part of the sport. Mental conditioning is every bit as important.

回到地面，布兰查德解释说身体调节只是这项运动的一部分。心理调节同样重要。

So here’s the basement window, it’s a little hard to see, but if you look outside you’ll notice the we are at ground level, or below ground level in the basement here.

这是地下室的窗户， 有点难看，但如果你向外看，你会注意到我们在地面， 或者地下室的地面以下。