Also, a memorized speech often sounds stilted and formal.

而且，背诵的讲话听起来往往生硬拘谨。

youdao

With only 2 weeks left in the semester, it is imperative that everyone have their speech memorized and be able to speak it fluently by class next week.

离这个学期还只剩2 周就要结束啦，下周来上课时，每个孩子都非常有必要记住他们的演说词，并且要流利地在课堂上进行演讲。

youdao

In two debates now, Bush has appeared tense and uptight -- and his answers have been, for the most part, memorized stock lines from his standard stump speech.

CNN: Bill Press analysis: McCain wins second debate in a row

Part of his dislike of the whole experience came from when he inevitably forgot one of those memorized lines, and went into a tizzy trying to recall it so that he would give the audience the entire speech as written.

FORBES: What Happens When You 'Wing' A Speech? Ask Tony Hsieh of Zappos