这两个人晚年时互通信函，诉说怀旧感伤之情。In old age the two men wrote each other wistful letters.他们一般通过电话互通消息。They usually exchanged messages by telephone.这3个团体之间会互通信息，共同帮助那个孩子。The three groups will all liaise with each other to help the ch...
他被派去扳道岔.He was assigned to man the switches.道岔无缝化是跨区间无缝线路发展的难点和关键技术.Jointless turnout is a key technique in developing CWR track across section.铁路道岔与中铁山桥平分中国市场.Railway yard with iron sanshan bridge in the Chinese market....