This could lead to the rats better remembering having freed it earlier, and wanting the robot to return the favour when they get trapped, she says.
她说，这可能会让老鼠更好地记住它们早些时候释放了机器人，并希望机器人在它们被困时回报这种恩惠。
2
In fact, the rats were less able to cope when they didn't get fat and sugar in their diets.
事实上，当饮食中缺少脂肪和糖类时，老鼠们很难成活。
3
The son of a Wichita, Kansas, auto parts dealer, he was an Eagle Scout who dreamed of becoming a doctor—dissecting rats and cats in his parents' basement to get ready.