Prdc
abbr. Polar Research and Development Center <美>（陆军）极地研究发展中心
🗣️ 情景例句
Your mother is thinking of
你妈妈正考虑
Not all butter that the cow yields.
母牛所产的未必全是黄油。
I assure you that you will feel no pain at all.
我保证你根本不会觉得疼的。