Ocs
abbr. （美国）候补军官学校（Officer Candidate School）；超速控制系统；振荡彩色顺序
🗣️ 情景例句
Oh, OK.
噢 ，好的。
We hope they will improve the environment.
我们希望他们把环境改善得更好。
Every day he leaves his home and walks to the lift.
每天他离家后就步行去乘电梯。