Iad
abbr. 国际天体物理十年（International Astrophysical Decade）
🗣️ 情景例句
you need to work at it, Grandpa.
你得常练它， 爷爷。
My home is in the capital.It's a cosmopolitan city.
我的家在首都.它是一个国际性的城市。
What are you doing?
你在干什么？