人类如同白鼠一样都可以在实验室里训练至害怕一种无害的刺激——一种声音或者颜色——同时给予电击即可。

Humans, like rats, can be trained in alaboratory to fear an innocuous stimulus—a sound or a color—by pairingit with a shock.

youdao

那是飞行员在放下飞机起落架的声音。我们一定是就要着陆了。你害怕吗？

It is the pilot putting the wheel down. We must be coming into land. Are you frightened?

youdao

那是飞行员在放下飞机起落架的声音。我们一定是就要着陆了。你害怕吗？

It is the pilot putting the wheel down. We must be coming into land. Are you frightened?

youdao