她把杏仁壳敲开，取出里面的果仁来做沙拉。

She cracked open the almond shells to get the ___kernels for the salad.

这个理论的核心在于它的基本原理。

The ___kernels of this theory lie in its fundamental principles.

这些玉米粒饱满金黄，适合爆米花。

These golden ___kernels are plump and perfect for making popcorn.

操作系统的内核负责管理内存和进程。

The operating system's ___kernel manages memory and processes.