period-and-level start-up control

例句：

1. 1. The system is designed to provide a period-and-level start-up control for the engine.
   该系统设计为提供发动机的周期与水平启动控制。
2. 2. The new software provides a more efficient period-and-level start-up control.
   新软件提供了更高效的周期与水平启动控制。
3. 3. The engineers used this method to optimize the period-and-level start-up control of the machine.
   工程师们使用这种方法来优化机器的周期与水平启动控制。