https://cn.vogon.today/%e7%b6%93%e6%bf%9f%e6%83%85%e6%99%af/%e7%be%8e%e5%9c%8b%e9%90%b5%e8%b7%af%e9%81%8b%e8%bc%b8%e9%87%8f%e4%b8%8b%e9%99%8d%ef%bc%9a%e7%b6%93%e6%bf%9f%e4%b8%8d%e6%99%af%e6%b0%a3%e7%9a%84%e8%b7%a1%e8%b1%a1/
美國鐵路運輸量下降:經濟不景氣的跡象