在 + Event/Place + 演讲
演讲 (yǎnjiǎng) means "to give a speech" or "a speech/lecture." It refers to a formal public address delivered to an audience. For example, 在会议上演讲 means "to give a speech at a conference," and 最后一次演讲 means "the last speech."
他下周要在国际会议上演讲。
Tā xià zhōu yào zài guójì huìyì shàng yǎnjiǎng.
He is going to give a speech at an international conference next week.
校长的毕业典礼演讲让很多学生感动得流泪了。
Xiàozhǎng de bìyè diǎnlǐ yǎnjiǎng ràng hěn duō xuéshēng gǎndòng de liúlèi le.
The principal's graduation speech moved many students to tears.
她为了这次演讲准备了整整一个月。
Tā wèile zhècì yǎnjiǎng zhǔnbèile zhěngzhěng yī gè yuè.
She spent an entire month preparing for this speech.