glut       
noun [ C ] uk/ɡlʌt/ us/ɡlʌt/
 供过于求,供应过剩
a supply of something that is much greater than can be sold or is needed or wanted
  The fall in demand for coffee could cause a glut on/in the market. 咖啡需求减少会导致市场供应过剩。 
 The current glut of graduates means that many of them will not be able to find jobs. 现在大学毕业生人数过多,这就意味着他们当中许多人无法找到工作。