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单语范例（未经PONS编辑处理）
These laws help increase the amount of available organs, decreasing the reliance of patients on the black market.
en.wikipedia.org Black market satellite dishes are nonetheless prolific, numbering well into the tens of millions.
en.wikipedia.org The audience gave its price on black market.
en.wikipedia.org The official exchange rate at this time was around $740 but black market value of the 150,000 was estimated to be near $30.
en.wikipedia.org Despite being illegal, the trade of tiger parts on the black market provides many poachers with substantial income.
en.wikipedia.org