Prdc
abbr. Polar Research and Development Center <美>（陆军）极地研究发展中心
🗣️ 情景例句
I have to think about it.
我得想一想。
He who makes constant complaint gets little compassion.
经常诉苦抱怨，难以博得同情。
What's the matter with him, doctor?
他得了什么病，医生？