... equivalent concentration 规定液度 equivalent layer 同位层 equivalent per million 百万分之当量 ...
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美国国家点火装置（简称NIF）耗资35亿美元，建在一个十层楼高的建筑里，占地面积有三个足球场那么大。 它将利用激光把氢同位素靶丸转化为热核能量。
The $3.5bn National Ignition Facility (NIF) sits in a 10-storey building covering three football fields and will harness the power of lasers to turn tiny pellets of hydrogen into thermonuclear energy.
采取点、线、面相结合， 岩石地层学、 生物地层学和同位素年代学相结合的工作方法，研究了这套地层的层序、划分和对比问题；
The succession, division and correlation of these strata are studied with lithostratigraphy, biostratigraphy and isotopic geochronology methods and by the combination of of point, line and area.
通过对设有不同位置转换层的空间结构分析，论述了转换层设置位置对板式转换结构动力特性和地震反应的影响。
The effect on dynamic properties and seismic responses of the structure with transfer slab is discussed when the various level of transfer story are arranged.
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