Oos
(oo 的复数) abbr. 面向对象程式设计（Object Oriented）；已订购而尚未交货的（on order）
🗣️ 情景例句
It's easy to pick something for my colleagues, but it's difficult for my boss.
给同事们的应该不难买，但是给老板的就难罗。
May I ask you how old you are?
我能问你多大了吗？
In the back row.
教室后排。