railroad test track

例句：

1. 1.The railroad company is conducting a thorough test track for the new trains.
   铁路公司正在为新火车进行彻底的测试轨道。
2. 2.The engineers used the test track to evaluate the performance of the new locomotives.
   工程师们使用测试轨道来评估新机车的性能。
3. 3. The railway authorities are confident that the test track will be successful in its testing phase.
   铁路当局相信测试轨道在测试阶段将取得成功。