“当以你的方式通过地下隧道时，那种适应仅只是浪费能量。”Daltry说。
"Those adaptations are simply a waste of energy when you're working your way through underground tunnels," Daltry said.
当能量在瞬间通过一个限制性通道时，冲击波就会形成；火车在穿越隧道时就能产生微弱的冲击波。
Shock waves can form when energy is quickly put into a confined channel; weak shock waves can be formed as trains enter tunnels.
由于隧道开挖采用多段微差爆破，所以多数实测爆破地震波中存在多个优势频率峰值，能量带分布很宽。
Multi-millisecond blasting is used in tunnel excavation, so there are several dominating frequency peak values in actual observation blasting seismic, and the energy distribution belt is wide.
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