例句與造句

1. "' Signalling block systems "'enable the safe and efficient operation of single track railways for which a danger exists of both head-on and rear-end collision, as opposed to double track, whose main danger is rear-end collision.
2. Usage of the bridge was restricted to one train at a time by a signalling block system using a baton as a tender-a third class carriage-a first class carriage-a third class carriage-a third class carriage-a second class carriage-a luggage van ( brake van ), slowed to pick up the baton from the signal cabin at the south end of the bridge, then headed out onto the bridge, picking up speed.
3. It's difficult to find signalling block system in a sentence. 用signalling block system造句挺難的