考古层次包含了从现有地下层面的两个主要延伸。
The archaeological level consists of two main extensions from the existing subterranean level.
文章首句指出:“由于‘地震反射法’(sr)在勾划地球的地下层面这方面的准确性,该方法一直是探寻石油储备的最重要的工具。” 这是一个判断句,为结论。
Because of its accuracy in outlining the Earth's subsurface, the seismic-reflection method remains the most important tool in the search for petroleum reserves.
第二句话对解释进行总的说明:“在实地作业中,通过将一系列波列源,诸如小规模炸药爆炸,排列成一个网格模式,从而将地下层面标绘出来。” 接下来是“地震反射法”的详细过程。
In field practice, a subsurface is mapped by arranging a series of wave-train sources, such as small dynamite explosions, in a grid pattern…
阶级层面的“下层”与“上层”的对立。
主地毯中上层面料材料、下层材料的面密度、前端涂层及装配工艺对地毯的吸音性能具有较大的影响;
The cover material of floor carpet, the substrate mass, the front heavy layer as well as the assembly process affect greatly on the carpet absorption performance.
主地毯中上层面料材料、下层材料的面密度、前端涂层及装配工艺对地毯的吸音性能具有较大的影响;
The cover material of floor carpet, the substrate mass, the front heavy layer as well as the assembly process affect greatly on the carpet absorption performance.
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