茫茫宇宙中，地球上的人类建立的文明是微不足道的。因为地球文明是如此短暂，人类开始创造文明才不过几万年，发展科学技术不过几百年，探索航天技术不过几十年，这和地球年龄的46亿年、银河系年龄100亿至15...
The vast universe, the establishment of human civilization on Earth is negligible. Because the earth is so short civilization, human civilization was only the beginning of the creation of tens of thousands of years, the development of science and technology, but a few hundred years, but decades of exploring space technology, and this age of the Earth 4.6 billion years, the age of the Milky Way 10000000000-15 .. .
