And this is not just philosophical, it's already known, that chemicals like diethylstilbestrol and estrogen, PCBs, DDT cross the placenta and effectively determine the likelihood of developing breast cancer and obesity and diabetes already when the baby's in the womb.
这并不只是哲理性的，已经众所周知， 化学制品，诸如己烯雌酚，雌激素， PCBs，DDT等 能够穿过胎盘 有效地决定 子宫内胎儿的乳腺癌的发展 以及肥胖和糖尿病 可能性。