Asphaltization
沥青化(作用)
🗣️ 情景例句
I see under activities that
我注意到在 活动 项目中提到
Have you had breakfast yet?
你吃过早餐了吗？
Yet a great many processes depending on such research are sought for with complete secrecy until the stage at which patents can be taken out.
然而，依赖这种研究的很多工艺程序是在完全保密的情况下进行的，直到可以取得专利权的阶段为止。