Picolinium
[化] 甲基吡啶┹; 皮考啉┹
🗣️ 情景例句
A professional writer?
职业写作人员？
Excuse me. Could you please tell me how to get to the station?
劳驾，请问到火车站去怎么走？
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。