She remembers that the man operating the device at first refused to accept her material.

她记得操作设备的人起初拒绝接受她的材料。

Unfortunately, only a few months after the traffic lights installation, a gas leak caused one of the lights to explode, severely injuring the police officer operating the device.

不幸的是，就在几个月后，煤气泄露引发其中一个信号灯爆炸，其中一个正在执勤的警察受重伤。