婴儿出生时体重为三公斤。

The baby weighed three kilos at birth.

《牛津词典》

相比之下，48%的超重婴儿和24%的正常体重婴儿在蹒跚学步时体重过重。

By comparison, 48 percent of the overweight babies and 24 percent of the normal-weight babies weighed too much at their toddler visits.

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这种办法被称为袋鼠妈妈护理法，用来帮助出生时体重过轻的婴儿生存。

This method, called kangaroo mother care, is an intervention designed to help low birth-weight babies survive.

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This normal weight animal like this has its whole equilibrium thrown off, its homeostasis thrown off when its dietary conditions change.

在饮食条件发生变化时,这些正常体重动物的生理平衡被打破,于是摈弃了原来的平衡饮食

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选