求翻译：Its widespread occurrence in feed and food chains is due to the contamination of foodstuffs prior to harvest or, more commonly, during storage.是什么意思？

待解决

悬赏分：1 - 离问题结束还有

Its widespread occurrence in feed and food chains is due to the contamination of foodstuffs prior to harvest or, more commonly, during storage.

问题补充：

匿名	2013-05-23 12:21:38 其广泛存在于饲料和食物链是由于收获，或者更常见的是，在储存过程中事先食品的污染。

匿名	2013-05-23 12:23:18 它的在饲料和食物链的普遍发生归结于粮食的污秽在收获之前或，通常，在存贮期间。

匿名	2013-05-23 12:24:58 Its widespread occurrence in feed and food chains is due to the contamination of foodstuffs prior to harvest or, more commonly, during storage.

匿名	2013-05-23 12:26:38 其普遍发生在饲料和食品连锁店是前收获或更多的食品污染引起常见的是，贮藏过程中。

匿名	2013-05-23 12:28:18 其在饲料和食物链中的分布广泛的发生由于粮食在成果之前的污染或，更多通常，在存储期间。

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