This was once thought to be so far in the future as to be irrelevant,said Christopher McKay, a research scientist at the National Aeronautics and Space Administration.
This was once thought to be so far in the future as to be irrelevant,said Christopher McKay, a research scientist at the National Aeronautics and Space Administration.
“这一切在过去看起来遥远得近乎无稽”，国家航天局的一位研究人员，克里斯托弗·麦克凯说。