Last week the issue was some leather cured with a known teratogenic substance, synthetic Nirret or something just as illegal that's still used in third world tanning.

上礼拜的问题是，部分皮革硫化时使用了致畸物质，某种非法但仍在第三世界用来硝制皮革的合成物质。

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The price of an illegal substance is determined more by the cost of distribution than of production.

非法药品价格更多的是由销售成本而不是生产成本决定的。

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Drugs again rained on the Olympics' parade as another athlete tested positive for an illegal substance.

兴奋剂再次煞了奥运会的风景，又有一名运动员的违禁药物检测结果呈阳性。

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The Obama administration could sue to block the legal markets from operating, on the grounds that actively regulating an illegal substance conflicts with federal drug law.

NPR: Wash. Vows To Try To Keep Weed In State _ But How?

The New York police's story -- as related by spokesman Christopher Pisano -- is that officers were called Thursday to her abode in Manhattan's theater district after her building manager reported the 27-year-old was smoking an "illegal substance" in the lobby.

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So it was into a campaign starved of substance that the issue of illegal immigration inserted itself.

ECONOMIST: The California governor's race