Western economics takes market externality as an important field of study and regards it as one of the basic phenomena of market defect.

现代西方经济学把外部性作为重要的研究范畴，认为它是市场缺陷的基本表现之一。

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The new car had to be withdrawn from the market because of a mechanical defect.

那种新汽车因有机械缺陷只好撤出市场。

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The cause of inefficient asset rearrangement is the defect of security market system.

造成无效率资产重组的原因是证券市场的制度缺陷。

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National Childhood Vaccine Injury Act of 1986 (the Vaccine Act), allowing state-court judgments against a vaccine manufacturer based on an alleged design defect would wholly undermine the preservation of a robust childhood vaccine market.

FORBES: High Court Upholds Federal Preemption of Design Defect Claims Against Vaccine Makers