The introduction of backpacks changed the lunch box scene a bit, he adds.
他补充道：“背包的出现有点改变了午餐盒的使用场景。”
Research shows that this could be mainly caused by improper use of backpacks.
研究表明，这可能主要是由于使用背包不当造成的。
Did you know, for example, that the backpacks that so many students carry today were originally designed for the military?
比如，你知道现在这么多学生背着的背包最初是为军队设计的吗？
Alden then started designing headphones into helmets, backpacks—anywhere that would make it easy to listen to music while snowboarding.
然后奥尔登开始在头盔、背包里设计耳机——可以在滑雪时听音乐的任何地方。
We stored our backpacks and found our seats.
我们把背包存放好，找到了座位。
How many backpacks have you owned since you went to school?
自上学以后，你有过多少个背包？
As we know, most backpacks are produced from different materials.
我们知道，大多数背包是由不同的材料制成的。
Smaller lunch boxes are preferred because they fit easily into backpacks.
人们更青睐较小的午餐盒，因为它们能轻松装入背包里。
Backpacks have become common and popular among students in the past 30 years.
在过去的30年里，背包在学生中变得普遍和流行。
It is such wonderful idea that you can put your old backpacks online for sale.
你可以把旧背包放在网上出售，这是一个很棒的主意。
Five years ago, a research showed that 85% of the old backpacks ended up in rubbish.
五年前，一项研究表明，85%的旧背包最终被扔进了垃圾桶。
If your backpacks become old, will you just treat them as rubbish and throw them away?
如果你的背包变旧了，你会把它们当作垃圾扔掉吗？
Some students pull wheeled bags filled with heavy textbooks and others carry backpacks.
一些学生拉着装满沉重课本的带轮书包，其他人则背着书包。
All in all, old backpacks are still of great value as long as we put them into use wisely.
总之，只要我们合理使用，旧背包仍然有很大的价值。
You can solve this problem by making use of your old backpacks to store all kinds of tools.
利用旧背包来存放各种工具，你就可以解决这个问题。
Some held bulging cloth bundles or backpacks; others had fled without anything.
他们中有些人带着包裹或背包，有些人则什么也没有。
I remember the pang I felt when they shouldered their backpacks and stepped on.
当他们肩背书包，上公共汽车时，我记得我感到一阵剧痛。
Not only that, but all the locals were laughing at the sheer size of our backpacks.
不仅如此，当地人还笑我们的背包太大。
If it's the space that backpacks offer that you hate to give up, then try sling bags.
如果你舍不得放弃背包给你提供的充裕的空间的话，那就试试吊带包。
While they snacked on food, Annabel packed food in their backpacks and Trevor's skateboard.
大家在吃东西的时候，安娜则往各自背包和特雷福的滑板包里装吃的。
Some clothing can be put in backpacks instead of suitcases. Then you can hang the backpacks.
有些衣物不一定要放在行李箱，可以放在背包里，然后把背包挂起来。
He wants to go to camping with tents and backpacks and you want to stay at a resort by the ocean.
他想带着帐篷和背包去露营而你想去一个海滨旅游胜地。
I checked thrift stores and found nothing that would work.And all the big box stores have are backpacks.
我去了很多旧货商店但是都没有找到合适的手提袋，而且所有的大超市卖的都是背包。
I checked thrift stores and found nothing that would work. And all the big box stores have are backpacks.
我去了很多旧货商店但是都没有找到合适的手提袋，而且所有的大超市卖的都是背包。
Use camelbacks if you are going on amore strenuous hike (backpacks with water bladders and drinking tubes).
如果你打算进行一次艰苦的远足的话，请使用再生橡胶(装上水袋和可以吸取水的水管)。
And students like its light weight, which offers a relief from the heavy books that weigh down their backpacks.
学生们也喜欢它的轻便，这将他们从背后沉重的书包下解放出来。
Modern walkers pass me on these paths, too, with mountainous backpacks and bedrolls, their noses buried in maps.
在这些小路上，也有背着登山包登山被的现代旅行者从我身旁经过，他们正埋头琢磨地图。
Modern walkers pass me on these paths, too, with mountainous backpacks and bedrolls, their noses buried in maps.
在这些小路上，也有背着登山包登山被的现代旅行者从我身旁经过，他们正埋头琢磨地图。
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