A few craters, such as some in the huge Caloris Basin impact feature visible on the upper right, appear unexpectedly to be ringed with a dark material, the nature of which is being researched.

比如，影像右上角可以看到一些陨石坑在巨大卡罗·维斯低地的碰撞特征，看上去有黑色物质环绕，形成的原因正在研究中。

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A few craters, such as some in the huge Caloris Basin impact feature visible on the upper right, appear unexpectedly to be ringed with a dark material, the nature of which is being researched.

比如，影像右上角可以看到一些陨石坑在巨大卡罗·维斯低地的碰撞特征，看上去有黑色物质环绕，形成的原因正在研究中。

youdao