1. 铁轨：rail support 导轨支架 | railroad track 铁轨 | raising valve 提升阀

2. 轨道：杉木 cedar | 轨道 railroad track | 标准 standard rail

3. 铁路轨道：railroad tie ==> 铁路轨枕 | railroad track ==> 铁路轨道 | railroad track scale ==> 轨道衡

noun

1. a line of track providing a runway for wheels

    e.g. he walked along the railroad track

    Synonym: railroadrailway