在澳大利亚，根据当地的法律规定，中小学的课本用完之后要交回学校。学校将这些课本在新学期开始时又发给低年级的同学使用，如此反复循环，一直到这些课本不能用为止。如果有需要更改的地方，则采用活页插入。活页也要循环使用。澳大利亚是个地大物博的富裕国家，森林资源远 In Australia, according to local laws, primary and secondary school textbooks are returned to school after they are used up. The school will send these textbooks to students in the lower grades at the beginning of the new semester. This cycle will be repeated until these textbooks cannot be used. If there is a need to change, use loose-leaf inserts. Loose-leaf pages also need to be recycled. Australia is a rich country with vast land and abundant resources. Forest resources are far away.