询问有关地铁旅行的问题的英文

asking questions about subway travel

• 询问:    ask about; enquire
• 有关:    have sth. to do wi ...
• 地铁:    metro; the subway; ...
• 旅行:    travel; journey; t ...
• 的:    4次方是 The fourth po ...
• 问题:    question; problem