该句子的主干是voicesnowcomefrommanyquarters；句首Justas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，第二个宾语从句的真实主语是不定式结构to keep... 翻译：就象吸烟问题一样，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。
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。
写作时，确保正确使用不定式和分词。
In your own writing, make sure you use gerunds and participles appropriately.
写作时，确保正确使用不定式和分词。
In your own writing, make sure you use gerunds and participles appropriately.
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