Demo

名词 demo:

1. a visual presentation showing how something works
   同义词：demonstration

动词 demo:

1. show or demonstrate something to an interested audience
   同义词：show, exhibit, present, demonstrate

dem.o

n.（名词）
【复数】 dem.os 【非正式用语】

A demonstration, as of a product or service.
产品展示：如产品或服务的宣传
A brief tape or recording used to illustrate the qualities of a musician or other performer.
示范带：用来说明音乐家或其他表演者水平的简要的录音带
A product, such as an automobile, used for demonstration and often sold later at a discount.
示范样品：用于产品宣传并通常在后来折价出售的产品，例如小轿车

【引伸】
dem.o
v.（动词）