克劳尔说幼小的动物和婴儿都有褐色脂肪组织，但是当人长大后，常常会失掉它。
Klauer said small animals and babies have brown adipose tissue, but as people get older, they tend to lose it.
猪日粮中甜味剂的使用是一种普遍实用技术，尤其是对于幼小的动物。
The use of sweeteners in pig diets is a common practice particularly in young animals.
而老鼠试验表明，这样的甲基化过程让幼小动物对压力尤其敏感，对新鲜事物也感到恐惧。
And in rats, such methylation makes young animals especially sensitive to stress, and also fearful of novelty.
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