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Gaunt underfed children ; badly undernourished .

憔悴的营养不良的孩子；严重的营养不良。

They look pretty happy . They 're underfed , but happy .

他们看起来很幸福。他们吃不饱饭，但是很快乐。

They are simultaneously over - and underfed : too many calories , not enough micronutrients .

他们同时经历着营养过剩和营养不良：热量太多，微量元素不足。

Males , for example , typically remain fertile when underfed , while females do not .

例如，当营养不良时，雄性一般保持可育，而雌性不能保持可育。

In the old days they were underfed and lacking in clothes .

在旧社会他们都缺吃少穿。