Prdc
abbr. Polar Research and Development Center <美>（陆军）极地研究发展中心
🗣️ 情景例句
You'll never guess what happened the other day!
你永远也猜不到前几天发生什么事了！
Coming events cast their shadows before them.
山雨欲来风满楼。
The work is coming along quite well.
工作进展得相当顺利。