n.核心；仁；中心；精髓

We must get at the kernel of the problem. 我們必須抓住問題的核心。

Are kernels of apricots edible? 杏仁能吃嗎？

The monitoring center is the kernel part of a home-oriented telemonitoring system.Its performance has influence on the tele-monitoring system definitively. 本文開發(fā)的中心監(jiān)護站軟件是遠程家庭多生理參數(shù)監(jiān)護系統(tǒng)的重要組成部分，其性能直接關(guān)系到遠程監(jiān)護系統(tǒng)的總體性能。

Mathematical thought and method is the kernel of mathematical knowledge. 數(shù)學(xué)思想方法是數(shù)學(xué)知識的精髓。