1 sentence

1. 教授在礼堂发表了一场关于环境保护的精彩讲演。

   jiào​shòu zài lǐ​táng fā​biǎo le yī chǎng guān​yú huán​jìng bǎo​hù de jīng​cǎi jiǎng​yǎn.

   The professor delivered a brilliant speech on environmental protection in the auditorium.

   Source: Dong Chinese Dictionary