It notes that, in recent years, experts have come to the conclusion that undernourishment between conception and a child's second birthday can have serious and long-lasting impacts.
2015年12月六级真题（第一套）听力 Section C
Ruel says in the 1980s Thailand was able to reduce child undernourishment by recruiting a large number of volunteers to travel the countryside teaching about health and nutrition.
2015年12月六级真题（第一套）听力 Section C
Undernourishment during this approximately 1, 000-day window can seriously check the growth and development of children and render them more likely to get sick and die than well-fed children.
2015年12月六级真题（第一套）听力 Section C
柯林斯高阶英汉双解学习词典释义
N-UNCOUNT
营养不足；营养不良
If someone is suffering from undernourishment, they have poor health because they are not eating enough food or are eating the wrong kind of food.
例句
Forty per cent of children under five in developing countries are short for their age because of undernourishment.在发展中国家，5岁以下的孩子中有40%因为营养不良而身高偏低。
英英词典释义
Noun
1. not having enough food to develop or function formally