Illegal demand for its shell, and for its eggs, meat and even stuffed juveniles as exotic gifts, have led to the dramatic decline of this species over the last century.

非法需要龟甲、卵、肉甚至是幼龟，导致上个世纪玳瑁海龟的数量剧减。

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In Asian countries, the high demand for shark fins for cooking has led to an illegal trade worth millions of dollars.

VOA: special.2009.04.03

demand for illegal drugs is in large measure responsible for the problem.

VOA: standard.2009.03.25

Our insatiable demand for illegal drugs fuels the drug trade.

VOA: standard.2009.03.25

People passing through the court system, therefore, seem to account for most illegal drug demand.

ECONOMIST: Drugs

What Attwell has done is relatively simple: he saw an expression of demand for books in the illegal copying and found a way to facilitate that demand legally.

FORBES: The Future For Bookshops Is To Pave The Cowpaths

And since educated immigrants are less likely to fill low-paying manual labor jobs, a demand for illegal immigrants willing to do that work would be created.

NPR: Critics Dispute Effects of Immigration Point System