acoustic soft mode的用法和样例：
- There are three ways to influence the correctness which are personal factors, working manner factors and soft mode factors.
- The variety of vibration frequency with tetragonal strain shows that the soft mode frequency increases with the tetragonal strain increasing followed by the transition of unstable soft mode to stable vibrational mode at a certain critical point.
- The elastic wave is coupled with the lattice vibration of parent phase in the transmission process, so soft mode is strengthed , and successor martensite nucleator is formed easily.
- The analogy between martensitic transformation and laser threshoId behaviour is ernphasised.The emission ratio of coherent phonon is given and the phonomenon of premartensitic soft mode is explained.