four-track英'fɔːrtr'æk美'fɔːrtr'ækCOCA¹⁰⁸⁰⁰⁹BNC⁸⁶⁶⁶⁰⁺⁹iWeb⁴⁸³⁵⁷ 基本例句 n.四声道¹⁰⁰ Speaking in London last year, Guillaume Pepy, president of the SNCFthe French national rail authority said that not building a four-track railway had been a mistake. SNCF法国国家铁路公司的总裁纪尧姆•佩皮 Guillaume Pepy去年在伦敦说,当初没建双复线铁路是个错误。 yeeyan