“Clearly environmental toxicants play a role in child neurodevelopment, and phthalates, in particular, have been understudied in this area,” Engel said.

“显而易见的是，环境中的有毒物质对儿童的神经发育影响很大，而邻苯二甲酸酯的危害尤其严重，”恩格尔说。

“Clearly environmental toxicants play a role in child neurodevelopment, and phthalates, in particular, have been understudied in this area, ” Engel said.

“显而易见的是，环境中的有毒物质对儿童的神经发育影响很大，而邻苯二甲酸酯的危害尤其严重，”恩格尔说。

The study will compare the levels of biomarkers in urine to see whether people smoking modified cigarettes are exposed to lower levels of toxicants or not.

这项研究将要比较尿液中生物标记物的水平来看吸食改进型香烟的人暴露是否在更低水平的有毒物质。

The result indicated that the productive toxicants in that smelting factory belonged to grade II in the comprehensive evaluation.

应用模糊数学的基本原理和方法，对冶炼厂镍、钴、铜、硫酸雾、二氧化硫、氯气等主要生产性毒物的危害进行综合评价。