1.rail line 铁路线
例句：More than 1,000 workers were repairing the damaged rail line, but it was unknown when traffic would resume.
一千多名铁路工人正在抢救破坏的铁路线，但是铁路何时恢复运输尚未可知abY=mf)MBfi3My~ZO。
2.test line 测试线，测试线路
例句：The connection to the 101 test line is established through the switching network.
与101测试线的连接是通过交换网络来建立的NEG*NK;EovF6W。