我却要使用关系代词，“谁做这“，“这是“,使用现在分词，分词，因为希腊语就是用这种方法,连接一个又一个从句。

I kept using relative pronouns like "who did this," "which this," and using ing-words,participles, because that's what you use in the Greek to string along clause after clause after clause.

youdao

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。

youdao

前一个polluted为过去分词,属定语从句中的谓语,后一个为过去式,属主句的谓语.句意为:曾被污染的那条河污染了另一条河。

The river which had been polluted polluted another one.

youdao