We think the Mars is a lifeless planet.
我们认为火星是一个没有生命的星球。
And today many scientists think that all of the alleged signs of life in the rocks could have just as easily been made on a lifeless planet.
而今，大多数科学家认为，岩石上所有已知的生命迹象都能够轻易地在一个无生命的星球发生。
And today many scientists think that all of the alleged signs of life in the rocks could have just as easily been made on a lifeless planet.
而今，大多数科学家认为，岩石上所有已知的生命迹象都能够轻易地在一个无生命的星球发生。
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