A massive rock fall trapped the men as they operated a tunnelling machine.
那些男人在驾驶隧道掘进机时，一次大面积的岩崩困住了他们。
《柯林斯英汉双解大词典》
2
Miners watch as the drill machine 'Sissi' breaks through the rock on the final section of the Gotthard Tunnel.
打通山体的工人正在查看钻孔机器“茜茜公主”打穿圣哥达隧道最后一部分的岩石。
3
After 15 years of construction work, the 9.5-meter (31-foot) wide drilling machine will bore through the remaining 1.5 meters of rock to join two ends of the tunnel some 2,000 meters under a mountain.