Cost effective Quality Assurance programs for down and feather products are a challenge because the material is a natural product and very non-homogeneous.

花费有效的成本，以获得羽绒羽毛产品的品质保证程序，是一项有挑战的工作，因为这种原料是天然产品而且非常不均一。

youdao

Reducing purchasing cost is an effective way for manufacturers to cut down production cost.

通过供应链管理降低采购成本是制造企业降低生产成本的有效途径。

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They provide a simple cost effective way to duplex flow equipment for applications where continuous flow must be maintained, with no flow interruption for down-side servicing.

他们使用在需要持续流动的应用中，提供了一种简便，低成本的方法，不会影响运行过程。

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If legislators were completely rational, they would rank all taxpayer-paid measures to save lives, from the most to the least cost-effective, and fund from the top down.

FORBES

Enhancing the efficiency of energy use is, hands down, the most cost-effective way to mitigate the environmental impact of energy use while fueling economic growth.

FORBES: Evan Mills