Lithophysa
石核桃; 石泡
🗣️ 情景例句
And a good paint job.
还需要好好的粉刷。
Are these books all yours?
这些书全是你的吗？
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。