人类每天都会接触许多天然或合成化合物,这些物质或随食物进入人体,或通过皮肤和呼吸被人从环境中吸收。这些化合物中有的为医药品,用来预防和治疗疾病;有些为农药,用以改善植物、动物以及人的健康状况。比如植物,在生长过程中容易受到杂草的竞争、病害的侵袭以及昆虫的侵害。简单地说,植物能健康地生长,就能为人们提供更充足的粮食供应,进而促进人体的健康。但是,所有的技术都是一把双刃剑。对于所有的化合物来 Every day, humans come into contact with many natural or synthetic compounds that enter the body with food, or are absorbed from the environment through the skin and the breath. Some of these compounds are pharmaceuticals used to prevent and cure diseases; some are pesticides to improve the health of plants, animals and people. Plants, for example, are vulnerable to weed competition, disease attack and insect infestation during growth. Simply put, plants can grow healthily, which can provide people with a more adequate food supply, thereby promoting the health of the human body. However, all technology is a double-edged sword. For all the compounds