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。
在考虑记忆的进化及其所有可能的方面时，思考一下如果记忆不会消失会产生什么结果是很有用处的。 【析句】本句的主干是it is helpful to do sth.，真正的主语是to consider这个不定式，当然它里面还包含了一个带条件从句的宾语从句。逗号前面的是一个状语。
In thinking about the evolution of memory together with all its possible aspects, it is helpful to consider what would happen if memories failed to fade.
目前，研究人员猜测梦是大脑情感自动调节系统的组成部分，当大脑处于“掉线”状态时对情绪进行调整。 【析句】Suspect后面是that引导的宾语从句；逗号之后的现在分词短语regulating moods…作定语，解释thermostat 的意思，句末的while引导一个时间状语从句。
Now researchers suspect that dreams are part of the mind's emotional thermostat, regulating moods while the brain is “off-line”.
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