First, the team found that even well-fed rats will work increasingly hard for sips of a vanilla milkshake with the right fat-sugar combo but that adding sugar steadily increases consumption.

• 首先，这个团队发现，即便是喂食良好，大鼠还是要费力去吸吮含有糖脂复合物的香草饮奶器，糖量增加会增加牛奶的消耗。