And you get bitter when they don't.

当他们不这样做时，你就会感到痛苦。

If they picked the right answer they were rewarded with a sugary solution. If not, they got bitter tonic water.

如果蜜蜂选择了正确答案，它们就能得到含糖溶液作为奖励。但如果选错答案，那它们得到的就是苦味的奎宁水。

And they got a nice little bitter.

- 他们有点苦涩。

The flies got bitter food, which they avoided—but the scientists then turned off the bitter neurons, and all of a sudden the flies changed their minds.

果蝇吃的是苦味食物，它们避免吃——但科学家随后关闭了苦味神经元， 果蝇突然改变了主意。