This layer - with an oxygen density probably about 5 trillion times less than on Earth - was "too thin to be remotely detected", said Ben Teolis of the Southwest Research Institute in San Antonio.
圣安东尼奥市西南研究所的本·特奥里斯（Ben Teolis）说，这个大气层——其含氧量可能不亚于目前地球的5万亿倍——是“如此稀薄一致难以遥远地探测。”
This layer - with an oxygen density probably about 5 trillion times less than on Earth - was "too thin to be remotely detected", said Ben Teolis of the Southwest Research Institute in San Antonio.
圣安东尼奥市西南研究所的本·特奥里斯（Ben Teolis）说，这个大气层——其含氧量可能不亚于目前地球的5万亿倍——是“如此稀薄一致难以遥远地探测。”
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