"We're going to be going into an orbit almost right away that is 40,000 miles out - like a fifth of the way of the Moon," Koch told BBC News.
When they are being manufactured in a weightless environment, those atoms line up absolutely perfectly. The vacuum of space also means that contaminants can't sneak in.，推荐阅读heLLoword翻译官方下载获取更多信息
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Number: All the pips in this space must add up to the number.，更多细节参见safew官方下载