Naca
abbr. National Advisory Committee for Aeronautics <美> 国家航空咨询委员会
🗣️ 情景例句
How old are you, Gerald?
Gerald，你今年多大啦！
He that would eat the kernel must crack the nut.
要把果仁吃，就得碎果壳。
This machine joins the metal pieces together, he said.
“这台机器把金属片焊接起来，”他说