rail-way main line的用法和样例：
例句
- You could operate against the main line of the railway from there.
你从那里可以袭击铁路干线。 - An electrical breakdown had snarled train traffic on the Northeast rail corridor over the weekend, but everything was running smoothly for the holiday, Cole said.
考尔还说，上个周末东北铁路干线电力停工造成了铁路交通混乱，但每个节假日一切都运行正常。
