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(jié)構(gòu)分析] 該句是一個(gè)并列結(jié)構(gòu)的復(fù)雜句。前一個(gè)分句帶有賓語(yǔ)從句，賓語(yǔ)從句的謂語(yǔ)是三個(gè)并列結(jié)構(gòu)的動(dòng)詞；后一個(gè)分句中，which 引導(dǎo)的非限定性定語(yǔ)從句是用來(lái)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(jié)構(gòu)] 該句是一個(gè)簡(jiǎn)單句，賓語(yǔ)research后面的現(xiàn)代分詞是它的定語(yǔ)，該現(xiàn)代分詞結(jié)構(gòu)看似復(fù)雜，其實(shí)是三個(gè)并列的that 引導(dǎo)的從句構(gòu)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(zhuǎn)基因"谷物副產(chǎn)品"消費(fèi)"抑制生長(zhǎng)，增加nontarget昆蟲(chóng)死亡率"，而且這些昆蟲(chóng)"是水生動(dòng)物重要的食物"，因此這可能有"未預(yù)料到的生態(tài)系統(tǒng)規(guī)模的后果"。
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