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1·She's involved in many extra-curricular activities.

她参加了许多课外活动。《牛津词典》

2·Participating in extra-curricular activities enables us to learn to negotiate and cooperate with fellow students.

参加课外活动可以让我们学习如何与同学进行协商与合作。

3·On the one hand, participating in extra-curricular activities allows children to develop their hobbies while on the other hand, too many such activities can increase children's burden.

一方面，参加课外活动可以让学生发展自己的兴趣，而另一方面，太多的课外活动可能会增加学生的负担。

4·I have lots of extra-curricular activities.

我参加很多课外活动。

5·I participated in several extra-curricular activities.

我参加好几个课外活动。

6·And I'll have a lot of extra-curricular activities too.

而且我还会参加很多课外活动。

7·Do you take part in any extra-curricular activities after school?

你参加一些课外活动吗？

8·We'll talk about extra-curricular activities, internships, and gap years.

我们会谈论课外活动，实习和学业间隙年。

9·Brian: Well I have some extra-curricular activities I have to go to.

布莱恩：嗯，我要去参加课外活动。

10·These extra-curricular activities could offer you ample opportunities.

这些课外活动可以为您提供充足的机会。