black market
noun [ C usually singular ] uk/ˌblæk ˈmɑː.kɪt/ us/ˌblæk ˈmɑːr.kɪt/
黑市，非法交易市场
illegal trading of goods that are not allowed to be bought and sold, or that there are not enough of for everyone who wants them
During the war, they bought food on the black market. 战争期间，他们在黑市购买食品。
They blamed high taxes for the growth of a black market in cigarettes. 他们把香烟黑市的蔓延归咎于高税收。