在整个地质时期，它们随着自然地气候循环减小或涨大。
Over geologic time, they have ebbed and flowed with natural climate cycles.
只有当某一地质系统拥有自然的或人工的界限，将该系统内的水与水文循环起来，这整个系统方能被恰当地称为与水文地质学相关。
Only when a system possesses natural or artificial boundariesthat associate the water within it with the hydrologic cycle may theentire system properly be termed hydrogeologic.
只有当一个系统拥有自然的或人工形成的边界来把边界中的水与水文循环联系起来的时候，才有可能把整个的系统恰当的成为与水文地质学有关。
Only when a system possesses natural or artificial boundaries that associate the water within it the hydrologic cycle may the entire system properly be termed hydrogeologic.
泵吸反循环钻孔扩底灌注桩与人工挖孔灌注桩相比，地质条件的适应性强，施工安全可靠。
Compared to artificial digging-hole pile, the pumping reverse-circulation under-reamed bored pile has higher adaptability to geological condition, and its construction is safety and reliability.
从磷在生态系统中的意义和磷的地质、生物循环过程入手，论述了从污水及污泥中回收磷资源的技术方法。
From the meaning of phosphorus in ecosystem and the geological and biological circulation of phosphorus, the technical way of recovering phosphorus from civic wastewater and sludge is discussed.
地下水源热泵系统运行期间，地下冷热量循环过程与地下不同岩土层（含水层）的水文地质特征密切相关。
The cold-heat cycle underground is closely related to the hydrogeological characteristics of various rock and soil stratum (aquifer) when groundwater source heat pump system is running.
该岩溶地下水年龄之所以偏大，主要是因为受制于其所处的地质环境的制约，水循环交替比较缓慢。
The major reason for the groundwater getting older is the water cycle becoming slower that is influenced by the geologic environment.
碳循环是一个生物地质化学循环圈，碳通过此循环在生物圈、土壤圈、地层、水圈、大气中交流。
The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth.
地壳早期演化研究的主题是探讨早期大陆形成、生长和再循环的地质过程及其地球化学和地球物理模式。
The topic of the study of the evolution of early crust is to probe into the processes of early continental formation, growth, and recycling, and their geochemical and geophysical models.
结果表明：徐州市水文地质单元岩溶地下水循环系统是一个复杂的循环系统，整个系统既有畅流型，又有汇流型和散流型。
The result shows that the karst water circulation system in Xuzhou is complicated with different flowing patterns of fluent flow, converging flow, and dispersing flow.
最近，广西第一地质工程地质施工公司引进了冲击反循环钻进方法用于滑坡治理工作，取得重大突破。
Recently the Guangxi First Geological Engineering Construction Company introduces the percussive reverse drilling method, and has made a great breakthrough.
目前，城市固体废物主要采用地质填埋处理，淋滤液循环可以使填埋场的稳定化进程加快。
At present, municipal solid waste is disposed mainly by landfills. Leachate recycle has been found to potentially greatly accelerate the "stabilization" of the landfill.
贯通式潜孔锤反循环钻进技术是一种先进的钻探方法，适用于复杂地层中的地质勘探以及各类钻孔工程。
The hollow-through DTH hammer drilling techniques with whole hole reverse circulation is adopted, it is proved that this technique can resolve drilling.
在系统分析基础上，初步提出了重建良性循环的人工—自然复合地质环境系统的思路与防洪对策。
On the basis of systems analysis, the idea of reconstructing a new human nature composite geo environmental system is developed and the strategies for flood prevention are advanced.
在系统分析基础上，初步提出了重建良性循环的人工—自然复合地质环境系统的思路与防洪对策。
On the basis of systems analysis, the idea of reconstructing a new human nature composite geo environmental system is developed and the strategies for flood prevention are advanced.
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