She made two appearances at the conference, both well-received.

made 是动词 make 的过去式，make 在这里表示"进行、完成"某个动作。 appearances 是名词 appearance 的复数形式，appearance 意思是"出现、露面"，指在公众场合的亮相或出场。 made appearances 这个短语表示"进行露面/出场"，指在公开场合正式出现或参与活动。