point cusp

例句：

1. 1. The point of the compass is the direction you want to go.
   指南针的指向是你想去的方向。
2. 2. The sharp point on the knife was causing me concern.
   刀子上的锐利部分让我感到担忧。
3. 3. The point of the problem lies in the solution.
   问题的核心在于解决方案。