For example, past research has linked exposure to pesticides and nitrates to low thyroid hormone levels (hypothyroidism) in pregnant women and hypothyroidism in pregnancy has been tied to lower intelligence test scores in offspring.
For example, past research has linked exposure to pesticides and nitrates to low thyroid hormone levels (hypothyroidism) in pregnant women and hypothyroidism in pregnancy has been tied to lower intelligence test scores in offspring.
比如，以往的研究发现，孕妇体内甲状腺激素含量低（甲状腺机能减退）与接触杀虫剂和硝酸盐有关，而怀孕期间甲状腺机能减退又与孩子智商低有关。