“我们有陡峭的山谷和许多类型的在这里大树，以及粗糙地面，人类请勿打扰，”他说，后发现一个红色的密封白头翁。

"We have steep valleys and many types of mature trees here, as well as rough ground that humans don't disturb," he said, after spotting a red-vented bulbul.

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这些探测器可以在岩石和各种粗糙的地面上行驶。

These rovers can drive over rocks and all kinds of rough ground.

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一个人独自关在一间牢房里，牢房的地面脏兮兮的，石头墙壁很粗糙，有两扇窗户，其中一扇面向着大海。

There's a man who has been by himself in a prison cell with a dirt floor, crude stone walls, and there's two Windows one of which looks out towards the ocean.

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