Naca
abbr. National Advisory Committee for Aeronautics <美> 国家航空咨询委员会
🗣️ 情景例句
It's tough getting an O.K. from the boss.
很难从老板那听到声“同意”。
All our work was in vain.
我们白干了一场。
I get hold of you at last.
我终于找到你了。