Carrying out the cost calculation of underground activity not only needs to set up and perfect the inner management system but also needs information system to back it up.
实施井下作业成本核算不仅需要建立和完善内部管理制度，还要有必要的信息系统予以支撑。
The latter two sources are limited to those few areas where surface water seeps down through underground faults or fractures to reach deep rocks heated by the recent activity of molten rock material.
后两种来源局限于少数区域，在这些区域，地表水通过地下断层或断裂往下渗透，从而接触到被近期的熔岩活动加热的深层岩石。
Istat, the national statistics office, estimates that underground economic activity amounts to 16% of GDP.
国家统计局估计这样的经济活动大概占了GDP的16%之多。
Geological studies conducted by Prof Sandiford and colleagues have revealed intense underground seismic activity from Adelaide to southeast Victoria.
Sandiford教授和同事们所进行的地质研究已表明，从阿德莱德到维州东南部的地下，地震活动非常剧烈。
But the gradual build-up of underground pressure can lead to occasional bursts of cataclysmic activity.
但是随之逐渐增长的地面下的压力可以引起偶然性的大变动的爆发。
The underground erosion and disintegration produced by the activity of ground water will result in formation of soil caves.
岩溶区地下水或地表水的活动，将对土层产生潜蚀作用及崩解作用，进而形成土洞。
The formation, distribution and fault structure of underground thermal water has a close relationship with the Mesozoic granitic magmatic activity.
地下热水的形成和分布与断裂构造及中生代花岗质岩浆活动具有密切关系。
The study results show that the activity of underground water plays a key role in the whole process from the cavity formation to the occurrence of ground collapse.
研究结果表明，地下水的活动在土洞的形成到地表塌陷产生的全过程中起着关键性的作用。
The study results show that the activity of underground water plays a key role in the whole process from the cavity formation to the occurrence of ground collapse.
研究结果表明，地下水的活动在土洞的形成到地表塌陷产生的全过程中起着关键性的作用。
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