地球——是我们赖以生存的家园，是它给我们提供了生存的环境和空间。
Earth is our home, which provides us with the necessary environment and space for living.
在太阳系的所有星球中，我们现在能肯定的是地球是我们唯一的生存家园。
Of all the planets in our own solar system, we are now pretty certain the Earth is the only one on which life can survive.
地球是我们共同的家园，为我们提供足够的水，食物，和生存空间。
The earth is the home to us all, offering us sufficient water, food, and living space.
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