名词
中文翻译：第三纪
同义词：
['tertiary period', 'tertiary stage']
例句：
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1. The third century saw the rise of the Roman Empire.
公元3世纪见证了罗马帝国的兴起。
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2. The third century is often referred to as the Dark Ages.
公元3世纪通常被称为黑暗时代。
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3. The third century was a time of great cultural and scientific advancement.
公元3世纪是文化和科学进步的重要时期。