So for the sample, the X would be audience effect.

因此针对这个例题，X 指的是观众效应。

The professor illustrates the audience effects by giving two examples.

教授举了两个例子来解释观众效应。

As you can see, the question is asking you to explain the academic concept of audience effect with examples.

如你所见，问题是要你用例子解释观众效应这个学术概念。

If you ever have heard of stage fright, then you are already familiar with the manifestation of the audience effect.

如果你曾经听说过怯场，那么你已经熟悉听众表现的表现了。

From the passage, the audience effect is described as the positive or negative impact an audience can have on people during any type of performance.

根据文章内容，观众效应被描述为观众在任何形式的表演中对人产生的正面或负面影响。