Children born into landless, and hence poor, families suffered reduced marital prospects, lower probability of reproduction, and higher infant mortality.
根据这个研究小组公布在《生态学》杂志上的研究结果，在没有土地的贫困家庭出生的儿童往往都经受了婚姻前景黯淡、生育率低下、新生儿死亡率高等痛苦。
For example, the goal of reducing infant mortality among lower social classes, more prevalent than higher up the scale, initially appears laudable.
比如说，低等社会阶层很流行的婴儿死亡率，它的流行程度比数据上写的更高，为了降低这种死亡率而建立目标，一开始好像很值得赞赏。
Any gains from having more than one offspring at a time might be expected to be like higher infant and maternal mortality rates.
每次从多于一个孩子那里获得的比期望的更多，通常会伴随着较高的婴儿死亡率和母亲死亡率。
Most telling is that although Venezuela's gross domestic product dwarfs Cuba's, Venezuela's infant mortality rate is still three times higher.
最有力的证据是，委内瑞拉的国民生产总值比古巴要高得多，但其婴儿死亡率却依然比后者高三倍。
Infant mortality is higher and life spans shorter because they don't have enough to immunize against diseases, prevent them from spreading, and cure the sick.
它们的婴儿出生死亡率较高、人口平均寿命较短，因为它们没有足够的资金用以对疾病进行预防和控制，也无法为病人提供适当治疗。
Any gains from having more than one offspring at a time might be expected to be outweighed by costs like higher infant and maternal mortality rates.
每次从多于一个孩子那里获得的比期望的更多，通常会伴随着较高的婴儿死亡率和母亲死亡率。
Any gains from having more than one offspring at a time might be expected to be outweighed by costs like higher infant and maternal mortality rates.
每次从多于一个孩子那里获得的比期望的更多，通常会伴随着较高的婴儿死亡率和母亲死亡率。
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