Officials said they believe a signal failure may have caused the crash, or collision.

官员们表示，他们认为可能是信号故障导致了列车相撞。

Mr. Gradgrind joined them before they had gone very far, and spoke with much interest of Stephen Blackpool; for whom he thought this signal failure of the suspicions against Mrs. Pegler was likely to work well.

他们还没走多远，葛雷格林先生就加入了他们的行列，饶有兴趣地谈到了斯蒂芬·布莱克普尔。对他们来说，他认为对佩格勒夫人的怀疑的这种明显失败可能会奏效。