They speak up freely, they laugh and joke, and they are actively and intensely engaged in classroom activities.

他们自由地高声谈笑，逗乐，课堂上积极主动。

youdao

They speak up freely, they laugh and joke, and they are actively and intensely engaged in classroom activities.

他们自由地高声谈笑，逗乐，课堂上积极主动。

youdao