By using the theoretical study results, the modification of the developed vertical disc brush wheel type seeding apparatus was curried up and the results were proved well.
应用理论研究成果对研制的垂直圆盘刷种轮式排种器的参数进行了改进，收到了较好效果。
Much insight has been gained by using theoretical and experimental methods to study the mechanism of pulsed discharge in water .
使用理论和实验的方法研究水中脉冲放电的机制，目前已经获得了很大的进展。
A variational complex is a theoretical tool for the rigorous study of Lagrangian systems. Using an exact variational complex can solve many problems about the variational calculus.
变分复形是用来研究拉氏系统的理论工具，利用一个正合的变分复形可以解决很多变分法方面的问题。
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