单词stratum
n.: 地层；阶层
网络: 社会阶层；岩层；分层
岩歧
阶层
〔地〕层位,地层
地层;层
复数：strata
n.layerbandleveldivisionbranch
Such a class of businessmen selling to the "lower strata" of the population did not exist in precapitalistic ages.
在前资本主义时期，这样一个销售商品给“较低阶层”民众的商人阶层还不存在。
This proposed method has been used for quality evaluation of natural Gamma spectral log in the Ordovician carbonate strata in Tahe oilfield.
目前这种方法在塔河油田奥陶系碳酸岩盐地层的能谱测井资料质量评价中取得了明显的效果。
The overburden in the mining influencing zone is often composed of red strata and coal beds in many coal mines.
许多矿区煤层采动影响范围内的覆岩层由红层和煤层共同构成。
While we were walking, I thought the lights of our Ruhmkorff devices would automatically attract some inhabitants of these dark strata.
我一边走一边想，我们带的兰可夫灯的灯光必然要引起那些沉黑的海底下居民的注意，齐集前来。
The white rock strata lying obliquely on the coast looks like the backbone of a dragon and extends from the coast into the sea.
眼前斜卧在海岸的白色岩层貌似龙脊，由海岸延伸入水。
The sedimentary features and strata touching relation in the Early-middle Mesozoic of Helanshan area were contrast to that of Ordos Basin.
贺兰山地区中生代早中期的沉积特征及地层接触关系与鄂尔多斯盆地内部相一致；
In the light of the voussoir beam theory, the broken upper strata would be able to form a stable structure to support the loads.
根据砌体梁理论，上覆岩层破断以后仍可以形成能够承受载荷的稳定岩体结构，因此老顶通常以给定变形的方式作用于直接顶。
And the surface deformation is continual and slow with a long duration of movement due to deep mining of iron ore in soft rock strata.
软岩地层深部铁矿开采引起的地表移动变形发展缓慢且周期较长。
The low dipping strata and structural disposition of the syncline present a fine opportunity for detailed field analyses.
向斜构造的缓倾斜地层和构造配置，有利于进行详细的现场分析。
The characteristic of "strata control-structural control- lithologic control" is quite apparent all over the mining area.
矿床控制因素显示出“地层-岩控-构控和时控”多位一体的特点。