principal maximum

例句：

1. 1.The temperature reached its principal maximum at noon.
   温度在中午达到了其主要最大值。
2. 2.The project's principal maximum is the ability to reduce carbon emissions.
   该项目的主要最大目标是减少碳排放。
3. 3. The company aims to achieve its principal maximum in market share growth.
   该公司的目标是在市场份额增长方面实现其主导最大值。