There was no sign of -------(human)life on other planets until now.

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• There was no sign of -------(human)life on other planets until now.
• 英语翻译Since early times,people have been fascinated with the idea of life existing somewhere else besides earth.Until recently,scientists believe that life on other planets was just a hopeful dream.But now they are beginning to locate places where life could form.In 1997,they saw evidence of planets near other stars like the sun.But scientists now think that life could be even nearer in our own solar system.One place scientists are studying very closely
• There was no sign of -------(human)life on other planets until now.
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