根据用途的不同，分为电脑双肩包、运动双肩包、双肩书包、束口绳包、军用背包、登山包等等。
According to different purposes, divided into computer bag, sports bag, backpack, bag, backpack beam rope, climbing bag and so on.
43岁的伍黄龙(音译)骑上摩托车找到了仰面倒地，奄奄一息的儿子，他的藏青色双肩背书包已浸透了鲜血。
Wu Huanglong, 43, raced over on his motorcycle to find his son lying, face up, on his blood-soaked navy backpack.
我个子高了，上学时间长了，回家作业增了，学习科目多了，我的双肩背起了更重的书包，心中的压力也不断加重。
I am tall, to go to school after a long time, homework increases, the subjects of study, I the double shoulder heavier schoolbag, heart pressure is getting worse.
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