Lefkasbestos
纤蛇纹石
🗣️ 情景例句
often took us somewhere in the city on the weekends.
经常在周末带我们去城市的一些地方。
Out!
滚出去！
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。