Staged vehicle
多級火箭
?? 詞語組成解析
a. 分期的
??? 情景例句
Would you like something to drink?
你們要點什么飲料嗎？
Who is calling, please?
請問你是誰？
First of all, it's been improved. And it's bigger, although it's more expensive.
首先，它已作了改進。而且機子較大，盡管價格貴些。