principal synoptic observation

例句：

1. 1. The principal synoptic observation method is to observe the sun, moon, and planets simultaneously.
   主要的合成观测方法是同时观察太阳、月亮和行星。
2. 2. The principal synoptic observation method has been used for centuries to predict weather patterns.
   主要的合成观测方法已经使用了数百年，用来预测天气模式。
3. 3. In this case, the principal synoptic observation method was used to study the effects of wind on the ocean surface.
   在这种情况下，主要的合成观测方法被用来研究风对海洋表面的影响。