backgrounder记者招待会backgroundn.背景；经历；幕后；后景vt.提供背景Background Management后台管理background to the case案件的背景background for the job工作的经验background probability背景概率background information背景材料background fluctuation背景波动background field model背景场模型background eradication(乳胶的)本底消除Background of Japanese日本概况background programming后台程序设计