ground level

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While the ICC offers wonderful linkage, this is only at the ground level.
ICC提供很棒的对接，但仅局限在地面水平。
Islands are often beautiful enough in their own right when seen from ground level: we don’t need to discern any particular pattern in their design.
当你在陆地上观赏各个岛屿，它们本身的风景已经足够美丽，无须再去探究小岛是何造型。
Nitrous oxide is stable at ground level but breaks down in the upper atmosphere to form compounds that trigger chemical reactions that destroy ozone.
一氧化二氮在地平面时是稳定的，但在高层大气中则分解而形成某种化合物，从而引发化学反应而破坏臭氧层。

One of the biggest rooms below ground level is the kitchen.
So if we go to the ground state, what you see is we're at that lowest energy level, and we only have one possibility for an orbital, because when n equals 1, that's all we can do.
如果我们在基态上，你可以看到，我们在能量最低的态上，只有一种，可能的轨道，因为n等于1，只有这种可能。
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In the center,at ground level, is a round pool of water.

At ground level, however, it was more low-key, with a style reminiscent of Northern California.
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If something is at ground level, it is at the same level as the ground, as opposed to being higher up or below the surface.