Oac
abbr. on approved credit 经过核准的信誉; optical aberrations compensation 光学失常补偿; outer approach channel 外部通道路线
🗣️ 情景例句
Yes, sir.
是的 ，先生。
Be quiet.
安静一点！
It looks like the shipping company did this.
应该是货运公司造成的吧。