Ssto
abbr. single-stage to orbit 单极轨道
🗣️ 情景例句
I like to study in the library because it's so quiet.
我喜欢在图书馆学习因为那儿很安静。
I hope you can have a good time on your trip.
我希望你的旅途有个好的时光。
He's been there for over two years. He's been there since two years ago.
他到校有两年多时间了。他两年前就到那儿学习了。