The tradition could date back to 300 BC.
这一传统可追溯到公元前300年。
Wiktionary tells us that the origin of the expression "no strings attached" may date back to ancient times.
维基词典指出,“无附加条件”这一说法的起源可以追溯到古代。
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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