The Audubon Society and other conservation groups, concerned over what they perceive as the serious threat to the environment posed by the policies of the government, are preparing for a major political effort.
=The Audubon Society and other conservation groups/, 考试用书concerned over/ what they perceive as the serious threat to the environment/ posed by the policies of the government/, are preparing for a major political effort.
# Audubon社团和其他谈话组织/，关注/他们认为对环境的严重威胁/由于政府政策导致的/这些主要为一个政治结果而准备。
*这句话虽然不长，却较难理解，原因是句子的主要内容，也就是concern over 后的内容比较复杂。但是我们不需要去搞清楚语法上这个句子是怎么形成的，我们只需把内容理解即可，所以不要花时间考虑语法，记住不看语法看内容。Audubon属于认识就反映不认识就过去的词类，但从后面的other conservation groups我们可以知道Audubon社团是一个谈话组织。
The animosity between those who regulate and those who are regulated has never been more pronounced than in recent debates over environmentalism and pollution control.
=The animosity/ between those who regulate and those who are regulated/ has never been more pronounced/ than in recent debates/ over environmentalism and pollution control.
#敌意/在管理者和被管理者之间/最激烈地表现出来/在最近的辩论中/关于环境保护主义和控制污染。
*这句话可以称之为短小精悍，句子不长，圈子却没少绕。who regulate 和who are regulated，应该是两种人，也就是管理者和被管理者。has never been more…，从没有更…,也就是最…，这样的反向理解可以更好的理解句子的意思，比如双否就可以理解成肯定。
