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我经常在学校门口看到许多小商贩在摆地摊,五颜六色的食品吸引着正在放学途中的很多同学,同学们应该知道这些色彩诱人的食品中暗含着许多人工合成色素。人工合成色素是从石油或煤焦油中提炼出来并经过化学方法合成的,因而或多或少带有毒性。小朋友们最喜欢吃五颜六色
I often see many small vendors sitting at the school gate. Colorful food attracts many students who are on their way out of school. Students should know that there are many artificial colors in these colorful foods. Synthetic pigments are extracted from petroleum or coal tar and are chemically synthesized and therefore more or less toxic. Children like to eat colorful