在这部电影中，他充当了导演。

Zài zhè bù diànyǐng zhōng, tā chōngdāng le dǎoyǎn.

In this movie, he served as the director.

她在公司中充当重要角色。

Tā zài gōngsī zhōng chōngdāng zhòngyào juésè.

She plays a crucial role in the company.

这个学生充当了学校活动的组织者。

Zhège xuéshēng chōngdāng le xuéxiào huódòng de zǔzhīzhě.

This student acted as the organizer for the school event.