查到了原文,經(jīng)過上下文的印證,這句話的意思是：
為了能夠?qū)ｉT生產(chǎn)出低過敏原的食品,在專門的生產(chǎn)體系下,用經(jīng)過基因改造的花生或大豆制作食品,但是如果有一批沒經(jīng)過基因改造的花生或大豆混進(jìn)去的話,那么就會降低基因改良食品的效果.
句干：A batch of peanuts or soybeans might contaminate machinery.
reserved for low-allergen versions是machinery的定語,
he suggests插入語,
reducing the benefit of the gene-altered food 狀語