translation.en: It's a very simple experiment where a monkey has been trained in a task that involves it manipulating a tool that's equivalent in its difficulty to a child learning to manipulate or handle a spoon.
translation.zh: 这是一个非常简单的实验，就是训练一只猴子 让它学习操作一个工具， 其难度等同于 让一个小孩学习使用一只勺子。