A Walk on the Moon As we walk around, we can see that the Moon’s surface is covered with a layer of dust. Notice how fine it

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答案 A Walk on the Moon As we walk around, we can see that the Moon’s surface is covered with a layer of dust. Notice how fine it is. Every step you take, you leave a perfect print of the sole of your boot. There are craters, large and small. Some are so worn down that you can hardly tell they are there. Others stand out more clearly. Often the craters overlap or lie inside one another. It is hard to tell how far away they are because there’s nothing in between—trees or houses or fields—of which we know the size. Everywhere we look, the land is dead and barren. The Moon is certainly not a friendly place to be. But then we notice, in the dark sky above the Moon’s surface, something that makes us feel much better. It is our home planet, the Earth, seen from a quarter of a million miles away—a beautiful blue, brown and white island of life floating in space.

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