Uncle looked very nervous at all the noise and activities, and Mina took his hand.
叔叔看起来对这些声响和活动感到很紧张，而米娜握住了他的手。
2
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。
3
What belongs to nature cannot be the result of human activities and on the other hand, cultural development is achieved against nature.