Ssto
abbr. single-stage to orbit 單極軌道
??? 情景例句
She's coming over this morning to help me with my math.
她今天早晨要過來幫我補(bǔ)習(xí)數(shù)學(xué)。
'Tis altogether vain to learn wisdom and yet live foolishly.
枉自學(xué)聰明，卻做愚蠢事。
Zip your fly!
閉嘴！