所以，只要简简单单的将马铃薯改成有机马铃薯，就能产生很大的潜在效果——因为用于商业出售的马铃薯是农药残留量最高的几样蔬菜之一。
A simple switch to organic potatoes has the potential to have a big impact because commercially-farmed potatoes are some of the most pesticide-contaminated vegetables.
他们很有必要知道什么时候买有机食物比较好，因为有些传统食物本身农药残留量很低，所以就没有必要买有机食物。
For those shoppers, it makes sense to know when to buy organic and which conventionally-grown foods are good enough because they already are low in pesticide residue.
目的：建立以顶空气相色谱法测定夫西地酸中有机溶剂残留量的方法。
OBJECTIVE: to determine organic solvent residual volume in fusidic acid by headspace gas chromatography.
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