例274　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.

【结构分析】该句子的主干是voices now come from many quarters；句首Just as结构做比较状语，意为“正如……一样”；insisting引导的分词结构做定语修饰主语voice，分词结构中含有两个并列的由that引导的宾语从句，第一宾语从句是that the science about global warming is incomplete，第二个宾语从句是that it's Ok to keep pouring fumes into the air until we know for sure。

【亮点回放】此句话的亮点在于分词定语insisting后面的两个超级宾语从句，两个宾语从句都很难，其中第二个宾语从句里面还有时间状语从句until。

【核心词汇】

just as on smoking　就像吸烟问题一样

voices now come from many quarters　来自不同领域的声音

global warming is incomplete　有关全球变暖的科学资料还不完整

【参考译文】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，而且在我们证实这件事之前可以向大气中不断的排放气体。