UD abbr. Underwater Demolition 水下爆破; [例句]UD is for larger market size without adaptation, and OP is for smaller market size with extensive adaptation.UD是指数量很大无需考虑适配的设计；OP是指数量很少而适配量很大的产品。相关单词:Ud abbr. undifferentiated 未鉴别的，未分化的ud abbr. would 将希望采纳，你的支持是我们的动力！
