See? “By” originally means “bye” or byway. That’s why, in fact, some people still spell “by the by” as “by the bye”. By the way, “that is by the by or bye” in this sense (secondary) is an idiom that ...

### Glossary: - Beijing station: 北京站 - Hong Kong station: 香港站 - Arlington station: 阿灵顿站 - Czech Republic: 捷克队 - Bulgaria: 保加利亚队 - Japan: 日本 ...

Professor Alice Roberts takes to the railways of Greece and Turkey as she learns about the ancient Greek civilisation that has had such a powerful effect on our lives today.