①加倍珍惜，不虚度年华

②有崇高理想，加强自身修养，增强自身的能力

③多做有意义有价值的事，让有限的生命焕发光彩

④尽情享乐不要留下遗憾

    For years, people have wondered whether there's life on other planets. Scientists may now be closer than ever to answering that question.

    Using powerful telescopes, a team of astronomers in South America discovered a new planet, called Proxima b. It circles a star named Proxima Centauri, in the same way Earth circles the sun. Proxima Centauri is the closest star to our solar system.

    Scientists believe the new planet has a rocky surface and is similar in size to Earth. More important, they've determined that the distance between Proxima b and its “sun” gives the planet a similar temperature to Earth's.This means it could have liquid water. The presence of water on a planet makes it possible for life to exist there. Scientists refer to planets like Proxima b as “Goldilocks planets” because they are not too hot or too cold, but just right to possibly support life.

    Astronomers have found other Goldilocks planets in the past, but none are as close to Earth as Proxima b. Still, the new planet is 4.2 light years from Earth—that is about 25 trillion miles away.

    Despite the long distance, astronomers hope to get a much better look at our new-found neighbor one day. But they'll need to wait until more advanced telescopes are developed. They may also send a robotic spacecraft to investigate the planet.

十八届五中全会上，提出了共享发展的新理念，要让全体人民在共建共享中有更多的获得感。在环境保护方面，提出实行最严格的环境保护制度，要让蓝天白云看得见。对此，公民应该（  ）