People form a line at the stage and describe briefly what they want to talk about.

讲台上人们站成一排，并且简短地介绍他们想谈论的话题。

youdao

People form a line at the stage and describe briefly what they want to talk about.

讲台上人们站成一排，并且简短地介绍他们想谈论的话题。

youdao