n.（生意）繁荣( boom的名词复数 )，深沉的响声，帆桁v.激增( boom的第三人称单数 )，猛涨，发出隆隆声，以低沉有力的声音说话...

booms的音标：...

This means smaller banks can cream off big profits during lending booms.这意味着在贷款业务剧增时小银行能够获得大笔利润。Booms run in cycle.景气状况周期性地出现.As the starter's gun booms, the boats spring into action.信号弹划过上空, 龙舟夺标开始了....