坚硬岩石 [岩] hard rock
- 此隧道系挖掘坚硬岩石而成。
The tunnel was excavated through solid rock. - 断层本身是不连续的,它们由坚硬岩石圈分割的板块组成。
The faults are not continuous; they are made of segments separated by barriers of solid rock. - 如果在没有共振的区域(比如在坚硬岩石区),持续的时间会更短。
In an area without resonances (for instance on a hard block of rock) it will last a shorter time.
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