O.d.
abbr. oute rdiameter 外径
🗣️ 情景例句
Could you tell me a little about your background?
能否请您简短地谈一下贵公司的背景？
No matter what happens, don't look excited.
不管什么事情发生，你总不要显得激动。
Experiments have proved that children can be instructed in swimming at a very early age.
实验证明，儿童在很小的时候就可以开始学习游泳。