snapshot  
noun [ C ]  informal uk/ˈsnæp.ʃɒt/ us/ˈsnæp.ʃɑːt/
  (PHOTO)     
  照片,快照
a photograph
   (UNDERSTANDING)      
 简介;简要情况
a piece of information or short description that gives an understanding of a situation at a particular time
  Credit rating agencies provide a snapshot of the risks an investment poses at any one time. 信用评分机构提供的是某一时刻投资风险的简要情况。