And many questions remain about specific dietary risk factors, the role of inactivity, environmental toxins and not breast feeding.

特殊饮食因素、环境毒素以及非母乳喂养有关都有可能存在有许多问题。

youdao

Now, researchers in Britain have found that breast-feeding may not protect infants against developing eczema and other allergic diseases.

现在，英国的研究人员已经发现母乳喂养可能对幼儿罹患湿疹以及其他过敏疾病无能为力。

youdao

The everyday act of breast-feeding is not only reproductively essential, it gives pleasure to both mother and child: perhaps the most innocent pleasure of which humans are capable.

哺乳的日常行为不仅是生殖的必要，它赋予母亲和孩子以快乐：也许是人类所能的最纯洁的快乐。

youdao

Dr.Vallenas says many mothers are discouraged from breast-feeding because they do not know how to get their baby to latch on properly to the breast's nipple, or because they suffer pain and discomfort.

VOA: standard.2009.08.01

Not breast-feeding is, nevertheless, an effective addition to pre-natal antiviral drugs.

ECONOMIST: A turning-point for AIDS?

Not just because other factors such as breast-feeding confound it, but because research suggests it is not as significant a risk factor as breast density.

NPR: Online Calculator Estimates Breast Cancer Risk

Many teaching in medical schools today were raised in the better-living-though-chemistry age, when infant formula was thought to trump the attributes of breast milk. (Formula was certainly an improvement over the non-pasteurized cow's milk that killed many infants at the turn of the 20th century, when breast-feeding was not in vogue).

CNN: Is the medical community failing breast-feeding moms?