The traditional study about idioms is generally descriptive not prescriptive.

对于习语的翻译，传统的研究多是描述性，而非规定性的。

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But policy analysis is not really the point of his book, which is at its best when it is being merely descriptive, not prescriptive.

但是政策分析并非本书实质的重点，因此最好只是描述一下，而不作说明。

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The psychologists insist, however, that they are not being prescriptive.

然而，心理学家坚称他们并非一味说教。

《柯林斯英汉双解大词典》

Because EPR is not prescriptive about implementation, it provides incentives for businesses to voluntarily reduce packaging and get innovative with materials and design.

FORBES: How Corporate America Might Just Save Recycling

Thus the guidelines are not prescriptive in nature, but are suggestive to facilitate knowledge-based decision-making to adopt OA policies and strengthen national research systems.

UNESCO: OFFICE IN TASHKENT

"Mortality really is scheme specific and too prescriptive a trigger will not fit that very comfortably, " said James Wintle of Watson Wyatt.

BBC: Warning on pensioners' longevity