一些学生拉着装满沉重课本的带轮书包，其他人则背着书包。
Some students pull wheeled bags filled with heavy textbooks and others carry backpacks.
曾经背着书包，站在站台，安静听歌等公车的男孩。
Once carried a bag, the boy stood at the platform, listened to the music quietly.
那是一个初秋的下午，我背着书包从学校蹦蹦跳跳地出来，天气真好啊！
It is an early autumn afternoon, I carry bag skipping out from school, it's a nice day!
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