He was also carrying a backpack or wearing a backpack.

这个人还带着一个背包，或者说是背着一个背包。

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Remember when lifting a backpack, or anything, to lift using the arms and legs and to bend at the knees.

记住，当提起背包或其他东西时，要用胳膊和腿提起，膝盖弯曲。

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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。

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"I don't want to spend more than twenty dollars for a backpack." Consumer spending is seventy percent of the economic activity in the United States.

VOA: special.2009.08.21

So we put one item in the backpack 9 and we've got a value of 9.

所以我们在背包里放一件物品,而它的价值是。

麻省理工公开课 - 计算机科学及编程导论课程节选

So I think I'm going to buy a new backpack.

所以我在考虑换一个新的双肩包。

I need 实战 - SpeakingMax英语口语达人

They weren't any of them coming back here with a nightmare in a backpack.

NPR: Excerpt: 'Then We Came to the End'

He plans to make other products, like a backpack and tote bag already in the works.

FORBES: What an Idea: Surfboard Bags from Billboards

All they had were a few items in a backpack when they walked into our home.

CNN: What it means to be a 21st century dad