N-COUNT A backpack is a bag with straps that go over your shoulders, so that you can carry things on your back when you are walking or climbing. 双肩包
我的书包在哪?
Free pattern for a simple drawstring back pack.
免费模式的一个简单的拉带背包。
My back pack isn't very heavy because I only brought the necessities .
我的背包不会很重,因为我只带必需品。
The heavy pack on his back let him think of what he would do when he got home.
VOA: special.2010.06.26
one of the soldiers said to Smith. "You'll never be able to walk all those miles with that heavy pack on your back."
VOA: special.2009.12.12
Seth helped John pack his fur and traps so he could carried them on his back.
VOA: special.2010.06.26
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