Today, I mainly talk about two issues.

今天，我主要谈两个问题。

youdao

I mainly deal in Chinese crafts.

主要经营中国工艺品。

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I mainly take charge of some of the major activities.

我主要负责主持一些大型的活动。

youdao

I mainly take charge of some of the major activities.

我主要负责主持一些大型的活动。

youdao