GATT第20条的三项具体环境例外允许世贸组织成员为重大的环保利益,尤其是保护人类和动植物的生命和健康、保护可用竭的自然资源等目标,而采取必要的贸易限制措施,但是,这些措施必须符合这三项例外所规定的规则。本文试图通过剖析有关案件的专家组和上诉机构报告,阐明第20条三项环境例外的简洁语言中所包含的复杂规则。 Three specific environmental exceptions to Article 20 of the GATT allow WTO members to take the necessary trade restrictions for major environmental benefits, in particular the protection of the life and health of humans, animals and plants and the protection of exhaustible natural resources, however , These measures must comply with the rules laid down by these three exceptions. This paper attempts to clarify the complex rules contained in the concise language of the three environmental exceptions to article 20 by analyzing the reports of expert panels and appellate bodies on the cases.