The method is that designing theory is simpleness and being understood is easy and avoiding complexity computation on state equations and drive equations.
该方法设计理论简单易懂，避免了状态方程和驱动方程的复杂计算。
2
You're not in a fit state to drive.
你现在的状态不宜开车。
《牛津词典》
3
When you left our place, you weren't in a fit state to drive.