n.核心；仁；中心；精髓
We must get at the kernel of the problem. 我们必须抓住问题的核心。
Are kernels of apricots edible? 杏仁能吃吗？
The monitoring center is the kernel part of a home-oriented telemonitoring system.Its performance has influence on the tele-monitoring system definitively. 本文开发的中心监护站软件是远程家庭多生理参数监护系统的重要组成部分，其性能直接关系到远程监护系统的总体性能。
Mathematical thought and method is the kernel of mathematical knowledge. 数学思想方法是数学知识的精髓。
