会上有许多观众。

[误] There was a large number of audience at the meeting.

[正] There was a large audience at the meeting.

注：audience 是集合名词，为“观众”的总称。所以“观众多”应说 a large audience，“观众少”则应说 a small audience。

参考例句：We know the audience likes it.but what about you? 我们都知道观众们很喜欢你呢?