n.堅果殼；小容器；簡明扼要
The nutshell includes the kernel. 果殼裹著果仁。
He put the situation in a nutshell. 他簡明扼要地說明了情況。
The new system is very complicated, but I will try to explain it in a nutshell. 新方法是很復雜的，但我要設法簡明扼要地解釋一下。
