A bridge would cost far more than a tunnel, but you would be able to go by rail or by car on a bridge, whereas a tunnel would provide a rail link only. ( Passage 3 )

【参考答案】

建大桥的开支要比修隧道大得多，但是在桥上既可以通火车也可以通汽车，而在隧道里却只能通火车。