Epigenite
砷硫铜铁矿
🗣️ 情景例句
No.
没有。
Yes, we should try to contact more.
是的，我们应该联系多点。
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。