Developments over the past decade, however, have given new credibility to the idea that Earth's biosphere could have arisen from an extraterrestrial seed.
Developments over the past decade, however, have given new credibility to the idea that Earth's biosphere could have arisen from an extraterrestrial seed.
然而，地球的生物圈可能发源自地球之外，这个概念历经过去数十年的发展，可信度已经更上一层楼。