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。

n.

1. an act of performing a play, concert, or other form of entertainment.
   ▸a person's rendering of a dramatic role, song, or piece of music.
2. the action or process of performing a task or function.
   ▸the capabilities of a machine or product.
   ▸the extent to which an investment is profitable.
   ▸Linguistics  an individual's actual use of a language, including hesitations and errors. Often contrasted with competence.
3. informal a display of exaggerated behaviour; an elaborate fuss.