They could also be rolled up and carried in a backpack, says the company's cofounder and president, Xunming Deng. "You could take it with you and charge your laptop battery, " he says.

公司董事长，创始人之一徐明灯（音译）说，它还可以卷起来放在背包里，“你可以带着它，在需要的时候来给你的笔记本充电。”

youdao

Summer is going to the end. How can they know? Their memories all still kept in my red backpack.

夏天快要结束了，它们又怎么会知道，它们所有的记忆仍然装在我红色的背包里。

youdao

They are in the backpack.

在双肩背包里。

youdao

Six days later, the backpack they'd thrown away was found -- this time in a New Bedford landfil.

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According to Kadyrbayev, the three collectively decide to throw away the backpack and fireworks because they don't want Dzhokhar Tsarnaev to get in trouble.

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In addition to the backpack ban, spectators at the events will be searched each time they enter the facility.

WSJ: Track Events Weigh Security After Boston Marathon Bombings