• 1. BC years: 公元前一万年
• 2. One Million Years BC: 公元前一百万年
• 3. BC a few hundred years: 公元前几百年

• 1.The origins of glass date back to 3,500 BC but it wasn't until the Roman Empire, 2,000 years ago, that the art of glass-blowing and the practical uses of glass became more widespread.
  玻璃的起源可以追溯到公元前3500年，但直到2000年前的罗马帝国，吹制玻璃的艺术和玻璃的实际使用才变得更加广泛。
  dict.yoduao.com
• 2.The ancient Olympic Games, which began in 776 BC, lasted for over 1100 years.
  古代奥运会始于公元前776年，延续了1100多年。
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• 3.The "black pharaohs" ruled for nearly 70 years until war withthe Assyrians forced the Kushites back to their homeland in 656 BC.
  公元前656年，与亚述人一役战败，统治了埃及将近七十年的黑法老王和他的库施人被赶回了老家。
  dict.yoduao.com

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