Ocm
abbr. Oracle认证大师（Oracle Certified Master, Oracle为数据库名）
🗣️ 情景例句
We would adopt payment by instalments for our present practice,
这次交易我们将采取分期付款方式，
A discontented man knows not where to sit easy.
不满足者坐无宁时。
It's a long story.
说来话长。