✅ 同义词
🗣️ 情景例句
I don't know.
我不知道。
No road is long with good company.
途有好伴，不觉路远。
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。