[countable] a sudden increase in trade and economic activity; a period of wealth and success（贸易及经济活动的）剧增；兴旺时期◆a boom in sales销售额大增◆The sales boom is attributed to low unemployment and low interest rates.销售额的大增归因于低失业率和低利率。◆the Internet boom of the 1990s1990 年代的互联网热◆a boom year (for trade, exports, etc.)（贸易、出口等的）兴盛的一年 OPP slump  ➡  picture at business cycle ⨁a consumer / credit / an economic / investment / a sales / spending boom消费热；信贷激增；经济热；投资热；销售热；开支激增 ⨁ a property / retail boom房地产／零售畅旺 ⨁ a boom period / year繁荣时期／的一年 ⨁ boom times / years繁荣时代／岁月 ●ˌboom and ˈbusta feature of an economic system or an industry where a period of success and wealth is followed by a period of difficulty, then by another period of success, and so on in a repeated pattern经济繁荣和经济萧条的交替循环◆IT is a highly competitive industry, prone to boom and bust.信息技术是高度竞争的产业，容易出现繁荣与衰退交替的循环。◆the boom-and-bust cycle of agriculture农业的兴衰周期 baby boom