In one experiment the professor put a monkey in a room with several small boxes.

在一次实验中，教授把一只猴子和几个小盒子放在一个房间里。

youdao

In one experiment the professor put a monkey in a room with several small boxes.

在一次实验中，教授把一只猴子和几个小盒子放在一个房间里。

youdao