Top-level activities are simply rolled-up from the lower levels.
顶层活动是从各个低层级累积得到的。
It's because not all insects cause us to shriek and go running for a rolled-up newspaper.
所以，并不是所有昆虫都会惹得我们高声尖叫，满屋乱跑地找张报纸卷起就打。
Carbon nanotubes are rolled-up sheets of graphite thousands of times thinner than a human hair.
碳纳米管是由比人的头发细千倍的石墨板卷曲成的管状结构。
To feed the demand, English ships tied up to Virginia docks and took in barrels of rolled-up tobacco leaves.
为了满足需要，英国的商船停靠在弗吉尼亚的码头装上捆扎好的成桶的烟叶。
This may require you to throw in some willing sacrifices, steadfast perseverance, and rolled-up-sleeve hard work.
这可能需要你投入进去，做些牺牲，坚定不移，以及挽起袖子干重活的精神。
我们把地毯卷了起来。
Stein rolled up the paper bag with the money inside.
斯坦把装着钱的纸袋卷了起来。
I rolled up my sleeves and pitched into cleaning the kitchen.
我卷起袖子，大搞厨房卫生。
She went to a cupboard, and drew out a large skin rolled up.
她走到一个橱柜前，拿出一大张卷起来的皮。
He also rolled up his sleeves and scrambled for money.
他也卷起袖子，为钱乱写一通。
Very soon afterward a bell rang and she rolled up her knitting.
不一会儿，铃响了，她卷起了她在织的东西。
Clothes rolled up in the towel and stowed in the panniers; check. The headlight battery pack on the charger; check.
衣服用毛巾卷起，塞进挂篮里；没问题。车前灯电池还在充电中；没问题。
The jacket was too big for him so he rolled up the cuffs.
这件夹克对他来说太大了，所以他卷起了袖口。
Bill finally rolled up two hours late.
比尔最终迟到了两个小时。
She rolled up all the windows.
她摇上了所有的窗户。
They eventually rolled up two hours late.
他们最终晚来了两小时。
His sleeves were rolled up to his elbows.
他的两只袖子被挽到了肘部。
The hedgehog rolled up into a ball.
刺猬团成了一个球。
Dan rolled up his sleeves and washed his hands.
丹挽起袖子洗了洗手。
他把地图卷了起来。
他们终于来了。
He began to waver in his resolution when a patrol wagon rolled up and more officers dismounted.
当一辆巡逻车开过来并且从车上下来更多的警察时，他的决心开始动摇了。
He rolled up the map and put it on the desk.
他把地图卷起来放在写字台上。
于是人们把它卷了起来。
When he talks about seeing the sky rolled up like a scroll he means that quite literally.
当他写道，看见天像书卷一样卷起来时,不要以为他用的是比喻手法。
Clothes rolled up in the towel and stowed in the panniers; check. Headlight battery pack on the charger; check.
轮胎，没问题；衣服卷起，用布包好，放在篮子里，没问题；车前灯电池还在充电中，也没问题。
Disappointed, Yu rolled up his resume in his hand and moved on.
于渺失望地将简历卷在手中继续前行。
Silk, light and easily rolled up, could travel overland.
丝绸很轻，且易卷，所以可以走陆路运输。
This material was called 'parchment' and could be rolled up into a scroll.
这种材料叫做“羊皮纸”，还可以卷成卷轴。
After that, Abe rolled up his sleeves and worked on a sketch of his sister.
那之后，艾贝卷起袖子给姐姐画一幅素描。
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