the act of showing someone how to do something, or how something works

This disaster is a clear demonstration of the need for tighter controls. 这场灾难清楚表明需要进一步加强控制。

Let me give you a demonstration of how the camera works. 让我来给你演示一下照相机的工作原理。

She told us how easy it was to use the software, then by way of demonstration produced a beautiful graph with a few clicks of the mouse. 她告诉我们使用这个软件非常容易，然后点击了几下鼠标就画出了一张好看的图表给我们作了示范。

We're going to a cookery demonstration tonight. 今天晚上我们要去看烹饪表演。

an occasion when a group of people march or stand together to show that they disagree with or support something or someone

The students are holding a demonstration against the proposed changes. 学生们举行游行示威，抗议提议中要进行的改变。

Protesters staged an anti-war demonstration. 抗议者举行反战示威活动。

a way of expressing a feeling or a quality

Huge crowds followed the funeral procession in a public demonstration of grief. 大批群众跟在葬礼队伍的后面，公开表达他们的悲痛。

There has been little demonstration of support for the proposal so far. 到目前为止，很少有人对这个提案表示支持。