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陈觉法; 张顺伍 重庆七中; 河北乐亭县汤家河高中

摘要：For a long time, humans have used technology to study the world around us, and Mars is the latest place we're using machines to explore. Besides the earth, the "red planet" is seen as the one place in our solar system (太阳系) most likely to have life.

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