In order to attract the rabbit's own stem cells to re-grow the cartilage, channels in the scaffold were filled with a growth factor protein.

VOA: standard.2010.08.11

The problem is in the second part they're throwing the rabbit at him but now he's okay.

问题是，在第二段影片中,他们是把小白兔扔过去的,不过，现在他已经不害怕了。

耶鲁公开课 - 心理学导论课程节选

It only works within species. So, in another experiment they put a rabbit in the other room and the chimpanzee would slap the lever repeatedly to make the rabbit scream in pain and jump.

这种结果只出现在同种动物上，在另一个实验里,他们在另一个房间放一只兔子,结果黑猩猩不停地拍杠杆,让兔子痛得上跳下窜，大声尖叫。

耶鲁公开课 - 心理学导论课程节选