So, our... and you know more about this than I do, but our basic understanding of addiction comes from an experiment that was done, like, in the 50s or 60s, where they took a rat and put it in a cage, and it had plain water and had water laced with drugs.
所以,我們......你比我更瞭解這一點,但我們對成癮的基本認識來自於一個實驗,這個實驗是在上世紀五六十年代做的,他們把一隻老鼠關在籠子裡,裡面有白開水,也有摻了毒品的水。