難句突破：

(1)   European Union environmental officials have determined that two kinds of genetically modified corn could harm butterflies, affect food chains and disturb life in rivers and streams, and they have proposed a ban on the sale of the seeds, which are made by DuPont Pioneer, Dow Agrosciences and Syngenta.

[主體句式] EU environmental officials have determined that...and they have proposed...

[結構分析] 該句是一個并列結構的復雜句。前一個分句帶有賓語從句，賓語從句的謂語是三個并列結構的動詞；后一個分句中，which 引導的非限定性定語從句是用來修飾the seeds的。

(2) In the decisions, Mr. Dimas cited recent research showing that consumption of genetically modified ''corn byproducts reduced growth and increased mortality of nontarget stream insects'' and that these insects ''are important prey for aquatic and riparian predators'' and that this could have ''unexpected ecosystem-scale consequences.''

[主體句式] Mr. Dimas cited recent research...

[句子結構] 該句是一個簡單句，賓語research后面的現代分詞是它的定語，該現代分詞結構看似復雜，其實是三個并列的that 引導的從句構成的。

[句子譯文] 在這些決定中，Dimas引用了最近的一些研究，這些研究表明轉基因"谷物副產品"消費"抑制生長，增加nontarget昆蟲死亡率"，而且這些昆蟲"是水生動物重要的食物"，因此這可能有"未預料到的生態系統規模的后果"。

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