The classical elementary waves in Riemann solutions include rarefaction wave, shock wave and contact discontinuity.
黎曼解涉及的经典基本波包括疏散波、激波和接触间断。
2
The Fetch Area Method (FAM) that derived from elementary waves theory was identified reasonable wave prediction during general winter monsoon season.
经验证明根据元素波模式推衍所得的面积风域法推算波浪，适合于推导季风期间海况的一种方法。
3
Further on are images of happier times: boats, trees and an elaborate drawing of an elementary school before the earthquake destroyed it. At the top of the building two small figures stand and wave.