1. The latest was a panel from the National Academy of Sciences, enlisted by the White House, to tell us that the Earth’s atmosphere is definitely warming and that the problem is largely man-made. (2005. 阅读. Text 2)
　　【译文】最近的行动是由白宫召集了一批来自国家科学院的专家团，他们告诉我们，地球气候毫无疑问正在变暖，而这个问题主要是人为造成的。
　　【析句】句子的主干是The latest was a panel from the National Academy of Sciences to tell us that...and that...。主系表容易辨认，to tell us作目的状语，两个并列的that引导tell的宾语从句。令整个句子略显复杂的是插入语enlisted by the White House，割裂了这句话的整体性。

　　2. But science does provide us with the best available guide to the future, and it is critical that our nation and the world base important policies on the best judgments that science can provide concerning the future consequences of present actions. (2005. 阅读. Text 2)
　　【译文】但是科学确实为我们的未来提供了最好的指导，关键是我们的国家和整个的世界在做重要决策时，应该以科学能够提供的关于人类现在的行为对未来影响最好的判断作为依据。
　　【析句】首先，句子的主干science does provide us...future and it is critical...。and连接两个并列的句子，前句是个简单句，容易理解；后句中，it是形式主语，真正的主语是后面的that从句，因为从句很长，若放在句首，句子则显得头重脚轻。that主语从句中，our nation and the world是主语，base是谓语，important policies是宾语，on the best judgments是宾语补足语，而judgments后有that引导的定语从句。注意，concerning the futrue...actions中的concerning此处是介词，意为“关于，就……而论”。

　　3. Just as on smoking, voices now come from many quarters insisting that the science about global warming is incomplete, that it’s OK to keep pouring fumes into the air until we know for sure. (2005. 阅读. Text 2)
　　【译文】就像吸烟问题一样，来自不同领域的声音坚持认为有关全球变暖的科学资料还不完整。在我们证实这件事之前可以向大气中不断地排放气体。
　　【析句】句子的主干是voices now come from many quarters,insiting that...,that...中，insisting是现在分词作定语，相当于that insist;两个that引导的都是宾语从句，作insist的宾语。第二个that从句中，还包含until引导的时间状语从句。