translation.en: Once the animal knows click, food, click, food, click, food -- so click is food -- we bring it in a cage with a hole, and actually the animal learns to stick the nose in the hole under which a target scent is placed, and to do that for five seconds -- five seconds, which is long for a rat.
translation.zh: 一旦鼠听到了声音，就有食物吃， 声音，食物，声音，食物 - 所以一旦有声音就是食物的反应 - 我们把鼠带到有个洞的笼子里， 然后实际上鼠学会 将鼻子放到洞口 下面带有目标气味的洞口， 它们停留5秒钟 - 5秒钟，对鼠来说很长。