The egg in the recipe acts as a binder.这个烹饪方法中鸡蛋起到黏合的作用。Put all the handouts for the course in a binder.把该课程的所有讲义放进活页夹里。She thumbed through the big loose-leaf binder.她匆匆翻阅那本大活页夹。I punched holes in the papers and filed them away in a binder.我在文件上打了孔,归档在一个活页文件夹里。