demonstration
US /ˌdem.ənˈstreɪ.ʃən/
UK /ˌdem.ənˈstreɪ.ʃən/

1.
演示, 示范, 展示
an act of showing how something works or how to do something
:
•
The chef gave a cooking demonstration.
厨师做了一个烹饪示范。
•
We attended a product demonstration at the store.
我们在商店参加了产品演示。