Iad
abbr. 国际天体物理十年（International Astrophysical Decade）
🗣️ 情景例句
Please do the work at your own convenience.
请在方便时把这事做一做。
Do you like skiing?
你喜欢滑雪？
Yes, I am. Please be careful, Meimei. Don't go too high.
是的，我扶着呢，小心点儿，梅梅。不要上得太高！