1·This is what you started with, a, a So stroke stoichiometry give you a relationship, which you can use to plug into your differential equation here.
行程化学计量给你一个关系，你可以用来，代入进你的微分方程。
2·The main factors that influence the quality of PZT piezoelectric ceramics include aggregation of powders, stoichiometry and aging etc.
影响PZ T压电陶瓷质量的主要因素有粉体团聚、化学计量及老化等。