loose-leaf binder; spring binder

• 活页夹

loose-leaf binder; spring binder的用法和样例：

例句

1. So, as my son,Adam prepared to leave for college,I jotted down a few words of counsel and put them in a binder.
   因此，在我的儿子亚当准备离家去上大学时，我零零星星写下一些忠告，放在一个活页夹里。