{a. An occasion of disparity or unlikeness: There is a large difference in seem concerning a clarinet and an oboe.知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。Want to thank TFD for its existence? Convey to an acquaintance about us, insert a url to this webpage, or pay a visit to the webmaster'