主旨演讲人病了，所以我不得不即兴发表了一篇演讲。

The keynote speaker was ill so I had to make a speech off the cuff .

youdao

要了解他的演讲的主旨是困难的。

It's difficult to understand the purport of his speech.

youdao

要了解他的演讲的主旨是困难的。

It's difficult to understand the purport of his speech.

youdao