performance和item有什么区别?

Question

My favourite item was the acrobatic show by the Junior One students.
还有一句The performance was wonderful.
这两句意思也差不多，但为什么一句用item，一句用performance？

Answer 1

performance

n.
1. 演出;演奏;表演[C]
The evening performance begins at 8 o'clock.
晚上的演出八点开始。
2. 履行;实行;完成[U][(+of)]
He failed completely in the performance of his duty.
他完全没有履行他的职责。
3. 成绩,成果;工作[C]
The novel was rated a brilliant performance.
这部小说被认为是一部出色的作品。
4. (机器等的)性能;(人的)技能,本事[U]
Engineers will test the performance of the tires.
工程师们将测试这些轮胎的性能。

item

n.
0. 物料项目 (任何一种自制或采购的零部件或组装件, 如最终产品、部件、子部件、零件或原材料)