而实验对照组仅仅写一些在他们生活中的日常琐事。
A control group merely wrote about a routine event in their lives.
在他们进行实验的过程中，出现了意想不到的困难。
Unexpected difficulties arose in the course of their experiment.
在他们的实验中，Johnson和他的团队研究了老鼠大脑的“愉悦中枢”。
In their experiment, Johnson and his team studied the "pleasure center" of rats' brains.
在他们进行实验的过程中，出现了意想不到的困难。
In the course of their experiments, we have unexpected difficulties.
在他的实验室里，有来自各个年龄段的人们，他们故意摔倒。
在他的实验室里，有来自各个年龄段的人们，他们故意摔倒。
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