校长在毕业典礼上发表了热情洋溢的致辞，高度赞扬了学生们取得的成就。

The principal gave a heartfelt ___encomium at the graduation ceremony, praising the students' achievements.

校长在毕业典礼上对优秀学生发表了热情洋溢的赞词。

The principal delivered a heartfelt ___encomium to the outstanding students at the graduation ceremony.