求翻译：一段精彩的开场白有三种作用。第一，吸引听众的注意力，激发听众的好奇心；第二，概述你演讲的主要内容；第三，向听众阐明听你演讲的必要性。是什么意思？

A wonderful opening three roles. First, to attract the attention of the audience, to stimulate the curiosity of the audience; overview of the main content of your speech; Third, to clarify the need to listen to your speech to the audience.

A wonderful Introduction There are 3. The first, to attract audience attention, stimulate the audience curiosity; the first 2, and an overview of your speech; the first 3 to the audience, stated the need for hearing your speech.

Section of splendid prologues have three kind of functions.First, attracts audience's attention, stimulates audience's curiosity; Second, outlines the primary coverage which you lecture; Third, to the audience expounded listens to necessity which you lecture.

A wonderful opening there are three roles. First of all, attract the attention of the audience, stimulate the curiosity of the audience and, secondly, provides an overview of the main elements of your speech and, thirdly, clear to the audience of the need to listen to you.

正在翻译，请等待...