Each of these is required to be populated in your file, and must have a value in order for the custom binder to work correctly.

这些元素都需要在您的文件中进行填充，它们必须具有值以便自定义绑定器能正确工作。

youdao

Lee believed that it would be a great idea for students to put their work online rather than keeping it stored in a binder.

FORBES: Seelio Is A Great Way For Students To Build Their Portfolios