During the time of the roman Empire (37 BC-476 AD), it was very difficult to make purple dye.

在罗马帝国时期（公元前37年-公元476年），制造紫色染料非常困难。

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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。

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Iran traces its national origin to Persia, an empire that emerged in the 6th century BC under the Achaemenid dynasty.

伊朗的起源可以追溯到波斯，一个形成于公元前6世纪在契美尼德王统治下的古老王朝。

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