整理书包的英语是 "organize one's backpack"。这个短语的来源可能源于人们常常使用背包来装书，因此整理背包就成了整理书包的意思。下面是一些例句：

I need to organize my backpack before going to school. (我需要在上学前整理一下我的书包。)

It's important to keep your backpack organized so you can find things easily. (整理好书包很重要，这样你就能轻松找到东西。)

She spends a few minutes every day organizing her backpack to make sure everything is in its place. (她每天花几分钟整理书包，确保一切都放在正确的位置。)