See? “By” originally means “bye” or byway. That’s why, in fact, some people still spell “by the by” as “by the bye”. By the way, “that is by the by or bye” in this sense (secondary) is an idiom that ...

专利审查是专利保护和运用的前提。近年来，国家知识产权局持续推进专利审查的理念更新、技术革新和工作创新，专利审查工作取得显著成效。据国家知识产权局消息，我国持续压减知识产权审查周期，发明专利平均审查周期已缩短至15.5个月，商标注册平均审查周期稳定在4 ...