Loose leaf

adj. having single sheets of paper that can be removed (of binders and notebooks)

The term loose leaf is used in the United States and some other countries to describe a piece of notebook paper which is not actually fixed in a spiral notebook. In some places, like the United Kingdom, the phrase loose leaf refers more to the flexible system of storing loose pages in a binder than to the actual paper.
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loose-leaf
danh từ sách, vở đóng theo cách có thể tháo từng tờ ra tính từ đóng theo cách có thể tháo từng tờ ra
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adj. แยกออกได้