日期:
来源:雅诚德英语网
In the above image, one of the huge tunnel-boring machines is shown just as it breaks through to one of the completed sections of the tunnel.
上图显示的是一台巨型隧道掘进机在工作,两条隧道正在贯通。
In the above image, one of the huge tunnel-boring machines is shown just as it breaks through to one of the completed sections of the tunnel.
上图显示的是一台巨型隧道掘进机在工作,两条隧道正在贯通。