時(shí)差N小時(shí):為何孕婦需要遠(yuǎn)離交通繁忙區(qū)域?(下)

　　It’s not clear why, exactly, heavy traffic could causepremature birth. Air pollution from car exhaustcould have something to do with it. Some studieshave found that women exposed to high levels ofcarbon monoxide were up to twenty-five percentmore likely to have a preterm baby than women inareas with cleaner air. It’s also possible that loudnoise from highways and freeways could play a roleby disturbing pregnant women’s sleep. Losing sleeptypically causes stress, which is linked topremature birth. Whatever the specific cause,these studies at the very least suggest that loud, heavy traffic, and pregnancy don’t mix.

　　目前尚不清楚，究竟為什么，交通繁忙可能導(dǎo)致早產(chǎn)的確切原因。從汽車尾氣造成的空氣污染可能與之有些聯(lián)系。一些研究發(fā)現(xiàn)，暴露在高濃度的一氧化碳中的婦女比在空氣清潔的地區(qū)的婦女高達(dá)早產(chǎn)的可能性高達(dá)百分之二十五。公路和高速公路的巨大噪音也有可能會干擾孕婦的睡眠。失眠通常會導(dǎo)致壓力，而壓力與早產(chǎn)有關(guān)。無論具體原因是什么，至少在這些研究表明，發(fā)出巨大噪音的繁忙交通應(yīng)當(dāng)與孕婦分離。