Orthogonal tests were carried out on the extraction conditions for Pachyrhizus leaf, the proportions of ingredients, and the stability of beverage.

利用正交试验对红薯叶的浸提条件、原料配比和稳定性进行研究。

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The criticism may be unfair-differences between products lie largely in the varying proportions of ingredients used-but the perception of reduced value will be hard to shift.

产品之间的差异主要取决于所用的配料比例，从这个角度来讲，上述的评论就显得可不公平，但是物值的下降却无法避免。

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Mutual proportions of chemical ingredients in tobacco leaves are in harmony fundamentally, but a few is less harmonious or unharmonious.

各化学成分间相互比例基本协调，少数烟叶化学成分比例不够协调甚至失衡。

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Many chefs spend years perfecting their recipes, learning to slice particular fish a certain way and toss it with precise proportions of ingredients in a unique motion for a specific amount of time.

WSJ: The Best Ceviche in Lima, Peru | In Search Of