Once kids started carrying book bags, that bulky traditional lunch box was hard to fit inside."But you can't just throw a sandwich in a backpack ," Jayasekara says.

一旦孩子们开始背书包，那种笨重的传统午餐盒就很难装进去了。“但你不能只往背包里扔个三明治。”贾阿塞卡拉说。

youdao

Among the bags Targus is producing is a backpack design.

在Targus正在生产的箱包中有一款是背包款式。

youdao

Business scope: canvas, Nylon Backpack, DIY knapsack and promotional gift bags and so on.

经营范围：帆布、尼龙类双肩背包、DIY背包及促销礼品包等。

youdao

Those bags may someday feel much lighter thanks to a scientist who's invented a new backpack.

NPR: Backpack Isolates Load for Better Carrying Ability