zenith magnitude

例句：

1. 1.The sun reached its zenith at noon.
   太阳在中午时分达到了它的顶点。
2. 2.The mountain is the highest point on Earth.
   这座山是地球上的最高点。
3. 3. The zenith of his career was in this field.
   他的职业生涯的巅峰是在这个行业。