铁路系统
先理解核心含义，再看它在真实句子里的用法。
铁路系统
A system of railways, including tracks, stations, and infrastructure.
The country's rail system is extensive and efficient.
该国的铁路系统覆盖面广且高效。
铁路系统
A system of railways, including tracks, stations, and infrastructure.
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Dictionary facts from AI_SUPPLEMENT.