Go along the main street.

沿着主街走。

What are the main dishes?

主菜是什么？

Who are the main characters?

主要人物是谁？

What is the main idea of the story?

故事的主要思想是什么？

Choose the main idea of the passage.

选择文章的主要思想。

Choose the main message of the passage.

选择文章的主要信息。

Then everyone goes to the main hall.

然后每个人都去主礼堂。

These are the main roles for this play.

这些是这个剧本的主要角色。

In the play, he served as the main character.

在这出戏中，他担任主角。

One of the main reasons is loss of habitat.

主要原因之一是栖息地的丧失。