principle of superposition

名词 principle of superposition:

1. (geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest
   同义词：superposition principle, superposition
2. the displacement of any point due to the superposition of wave systems is equal to the sum of the displacements of the individual waves at that point
   同义词：Huygens' principle of superposition