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1·When they feel frightened, they roll up into a ball to protect themselves.

当它们感到害怕时，它们会蜷缩成一团来保护自己。

2·Duh you have to roll up the Windows first!

嗯……你必须先把车窗摇上去！

3·Figure 3: Roll up generalization strategy.

图3：上滚一般化策略。

4·Roll up your sleeves; it's world blood donor day.

卷起你的袖子。今天是世界献血日。

5·Can you roll up your sleeve for me to have a look?

你能把袖子卷起来让我看看吗？

6·He too would roll up his sleeves and scribble for money.

他也卷起袖子，为钱乱写一通。

7·It is time for him to roll up his sleeves and concentrate.

现在是时候集中精力大干一场了。

8·Button down his shirt If you roll up your sleeves, bigger can be better.

穿带有衣领扣的男式衬衫如果你要卷起袖子，卷得大一点比较好。

9·No matter how ambitious the plan, you have to roll up your sleeves and start somewhere.

无论你的计划多么宏伟，你都需亲自卷起袖子，从某一点着手。

10·Now that we've covered the basics, let's roll up our sleeves and dive into the details.

了解基本知识后，现在可以卷起袖子深入细节了。