主要原因是为了保护他们的国家。

The main reason was to protect their part of the country.

主要原因之一是栖息地的丧失。

One of the main reasons is loss of habitat.

最后说说他激励你的主要原因。

End with the main reasons why he inspires you.

主要原因之一是人们想挑战自己。

One of the main reasons is that people want to challenge themselves.

他们如此兴奋的主要原因是熊猫实在太可爱了！

The main reason why they were so excited is that pandas are just so cute!

可悲的是，人类活动是帝王蝶数量减少的主要原因。

Sadly, human activity is the main reason why the number of monarch butterflies is falling.

其中一个主要原因是米老鼠像一个普通人。

One of the main reasons is that Mickey was like a common man.

说善意的谎言的主要原因之一是让别人感觉好些。

One of the main reasons for telling a white lie is to try to make others feel better.

其中一个主要原因是它们的自然环境因森林被砍伐而遭到破坏。

One of the main reasons for this is that their natural environment is being destroyed as forests are cut down.

这是我选择这所学校的主要原因。

This is the main reason I chose this school.