In the real world with its imperfect surfaces, getting your robot not to veer into the wall on its left or veer too far away from that wall is quite a challenge in itself.

但是，在真实世界中墙的表面不是绝对平的，如何避免机器人靠向墙壁或离墙太远本身就是个难题。

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Researchers can use the observations to infer not just how far away the galaxy lies but also the overall scale of the universe and some details of its expansion.

研究者不仅可以利用观测结果来推知星系有多么遥远，还可以推知宇宙的整个大小及其膨胀的一些细节。

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Another strange image taken not far away shows a Stonehenge-like arrangement of objects radiating outward, with fighter jets parked at its center.

在不远的地方，拍摄到的另一张奇怪图片。它好像表示有一个像巨石阵那样安排向外辐射的物体，在其中心位置停驻着一些战斗机。

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Southcorp has already invested with a U.S. partner in the Seven Peaks winery in Edna Valley on the coast of central California and is starting a 200-hectare vineyard of its own not far away.

FORBES: Chateau Southcorp

While Nano-Tex's stain- and wrinkle-resistant technology, called NanoCare, has been the first out of the gate, its NanoFresh (wicks away odor from sports clothing) will not be far behind.

FORBES: Nanotechnology's Disruptive Future

Not far away is a Protestant church that draws 3, 000 souls to its weekend services.

CNN: ASIANOW - TIME Asia | China: Inside China's Search for Its Soul