Apex cordis

例句：

1. 1. The apex of the mountain is visible from here.
   从这儿可以看到山顶。
2. 2. The peak of the mountain was covered in snow.
   山顶被雪覆盖。
3. 3. The zenith of his career was achieved at age 30.
   他职业生涯的巅峰是在30岁的时候实现的。