People are rarely exposed to chemicals one at a time. PeopleImages/iStock via Getty Images PlusImagine an ordinary Tuesday. You wash your hair, put on deodorant, drink coffee, pack lunch in a plastic container and commute through traffic to get to work. At work, the custodial staff wipes down a shared table with disinfectant. At home, you cook dinner, clean the kitchen and run the dishwasher.
人们很少一次只接触一种化学物质。PeopleImages/iStock via Getty Images Plus想象一个普通的星期二。你洗头、涂除臭剂、喝咖啡、用塑料容器打包午餐，然后穿过交通拥堵去上班。在工作中，保洁人员用消毒剂擦拭共用桌子。回到家，你做晚饭、清理厨房并运行洗碗机。
Each of these ordinary moments can involve exposure to chemicals. By itself, that is not a reason for concern. After all, chemicals make up the entire physical world.
这些普通时刻中的每一个都可能涉及接触化学物质。单凭这一点，并不值得担忧。毕竟，化学物质构成了整个物理世界。
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