Orasa
abbr. operational research and system analysis 操作研究与系统分析
🗣️ 情景例句
Frank, you've never played charades?
Frank，你从来没玩过哑谜？
You have your choice of three flavors of ice cream.
你有3种风味的冰淇淋可选择。
She can't come. She has to help her Mommy!
她不能来。她得帮她妈妈的忙！