It is in emergency, also, that the station master may be called on to make decisions
of considerable importance in regard to the working of the trains past his station,
though in general operation control systems are now so extensive, more particularly
on main lines, that he can obtain without any great delay a decision by telephone
from the control office of the area in which his station is situated as to any altered
methods of working that it may be necessary to put in force.
尽管一般来说，运行控制系统目前已得到广泛应用（特别是在主干线上）， 站
长可以通过电话从其车站所在地区的调度室迅速获得必须实施的有关改变列车
运行方式的决定，但在紧急情况下，可能还要求站长对过站列车的运行做出重
要的决策
科技英语翻译：小句推进，定语，状语前置，信息重心句后置。
