the inner part of a nut or seed （坚果或籽粒的）仁，核 pine/apricot kernels 松仁；杏仁
the central, most important part of an idea or a subject （思想或主题的）核心，中心，要点 the kernel of her argument 她的论据的核心。 There may be a kernel of truth (= a small amount of truth) in what she said. 她说的话可能有一定的真实性。
Word OriginOld English cyrnel, diminutive of corn (the plant).