在线词典开卷有益开卷:打开书本,指读书;益:好处。读书总有好处。拼音kāi juàn yǒu yì解释开卷:打开书本,指读书;益:好处。读书总有好处。近义词开卷有得反义词读书无用英文释义lit. opening a book is profitable (idiom); the benefits of education