Also left unexplained was why railway signals did not stop the second train before it hit the first one.

另外，在第二辆列车冲向第一辆列车前，为何没有铁路信号加以阻止。 这也同样令人匪夷所思。

youdao

The general manager of the Metro system, John B. Catoe Jr., said one train had stopped at a platform and was waiting for permission to proceed when it was hit from behind by the second train.

地铁公司的总经理John B. Catoe Jr.说，事发当时其中一列列车正停在站台边，等待发出驶出的命令，就在这时它被另一列来自后方的列车撞上了。

youdao

And then the second train was delayed.

后来第二班火车又晚点了。

youdao

The second train was not so lucky.

VOA: special.2009.08.20

It happened in the train station in Washington,D.C., on July second,eighteen eighty-one.

VOA: special.2010.04.22

Some cars on the second train also derailed as a result of the collision.

WSJ: Probe begins after Conn. commuter trains crash

The second train, departing at 9:45 am, is the Baie St Paul Discovery tour, which terminates at Baie St Paul.

BBC: A theatrical journey into Canada��s Charlevoix

Jamie Jiao was sitting in the front car of the second train.

CNN: Investigator: D.C. Metro crash 'a scene of real devastation'