(geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest
双语例句
The electric current density vector field also satisfies superposition principle, some applications thereof are introduced. 摘要电流密度矢量场也满足叠加原理，给出了一些应用电流密度场叠加原理的例子。
Using the principle of mode superposition, the formula is given for finding the modal parameters. 利用振型叠加原理，求得整机的动态特性的模态参数表达式。
