You can feel very proud of your grandson, Mr. Stewart.
你可以为你的孙子感到非常的骄傲, Sewart先生。
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。