名词
中文翻译：Unknown
同义词：
['theme', 'theme speech', 'main points']
例句：
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1. The keynote speaker was a renowned expert in the field.
主题演讲者是一位在该领域享有盛誉的专家。
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2. The conference featured several keynote speeches on sustainability.
会议设有几个关于可持续性的主旨演讲。
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3. The presentation covered all the key points we discussed earlier.
演示涵盖了我们之前讨论的所有要点。