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

1.
演示, 示範, 展示
an act of showing how something works or how to do something
:
•
The chef gave a cooking demonstration.
廚師做了一個烹飪示範。
•
We attended a product demonstration at the store.
我們在商店參加了產品演示。