我把所有重要文件都整理在这个活页夹里了。

I keep all my important documents in this ___binder.

面包师傅在面团中加入黏合剂使面包更有弹性。

The baker added a ___binder to the dough to make the bread more elastic.

这些古籍需要专业的装订师来修复。

These ancient books need a professional ___binder for restoration.

这个装订机可以把纸张牢固地固定在一起。

This ___binder can securely fasten the papers together.