peak sound pressure

例句：

1. 1. The peak of the mountain is visible from here.
   从这儿可以看到山顶。
2. 2. The climbers reached the peak before sunset.
   登山者在日落前到达了顶峰。
3. 3. The peak of the volcano erupted suddenly.
   火山的巅峰突然喷发。