[重点词汇]：huge：巨大的；Telescope：望远镜；at least：至少；Galaxy:银河系；be similar to：和…相似；
In the past, it was hard to look for signs of intelligent life in the universe. But now, powerful telescopes allow scientists to discover smaller planets—the size of Mars or Earth—in other solar systems. These planets might have intelligent life.
在过去，很难在宇宙中寻找智慧生命的迹象。但是现在，强大的望远镜允许科学家在其他太阳系中发现火星或地球大小的小行星。这些行星可能有智慧生命。
[重点词汇]：In the past：在过去；look for：寻找；sign：标志，迹象，指示牌；powerful：强有力的；allow：允许；discover：发现；solar systems：太阳系；
Have beings from space already visited Earth? "Probably not," says Shostak. "It’s a long way away. However, intelligent beings may contact us in other way, such as radio signals.
有来自太空的生物已经造访过地球吗？""可能不会，"肖斯塔克说，离这儿很远。然而，有智慧的生物可能以其他方式与我们联系，例如无线电信号。
In fact, they may be trying to communicate with us now, but we don’t have the right tools to receive their messages. However, this is changing. By 2025, we could make contact with other life forms in our universe and we might help each other."
事实上，他们现在可能正试图与我们沟通，但我们没有合适的工具来接收他们的信息。然而，这种情况正在改变。到2025年，我们可以与宇宙中的其他生命形式取得联系，我们可以互相帮助。"
[重点词汇]：signals：信号；In fact：事实上；communicate with：和…交流；form：形式；
