这次演讲的主题是关于行动的。
举个例子，马可要做一个关于“嗜好”的即席演讲，他将这个主题分成了几部分，注意下面他在大纲中是如何运用有关联副主题模式的。
When Marco was asked to give an impromptu speech on“Addictions,”he divided the topic /into/ several parts. Notice how he used the pattern of related subtopics in the outline that follows.
今天很高兴能够在这里演讲，给我定的主题是关于市场竞争的。
Today I am very glad to be here to give my speech, the topic is about the market competition.
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