Naca
abbr. National Advisory Committee for Aeronautics <美> 国家航空咨询委员会
🗣️ 情景例句
Never know what?
说不定什么？
It's two blocks straight ahead.
笔直向前走2街区。
On, in just a day or two, I think.
哦，我想就这一、两天吧。