The law of conversion of mechanical energy and the law of conservation of mechanical energy are revealed.
又一次揭示空间的机械能势转换和守恒定律；
2
The law of heat spontaneous transfer and the law of heat-work conversion are correspondence between positive energy spectrum(PES) and negative energy spectrum(NES).
具体分析了负能谱系统中“热”的自发传输规律和“热-功”转化规律。
3
Recent trends in the Lagrange equation's conversion and form from inertial system to non-inertial system, the application of energy theorem, energy conservation law, etc. are introduced.