在经过对植物体系进行酶相对数量的调整后，研究人员会在这些酵母中加入一种名为二甲基吗啡的混合化学物质，这样就会得到纯净的吗啡。
After tweaking the system to adjust the relative amounts of the enzymes, the researchers could feed their yeast a precursor chemical called thebaine, and get pure morphine in return.
小的分样筛与漏斗法结合从植物样品获得纯净的线虫。
Obtaining the pure nematodes from plant sample by using the small sample sieve combining funnel method.
这是未加工的甘油，来自纯净原始的植物油。
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