clear-cut       
adjective uk/ˌklɪəˈkʌt/ us/ˌklɪrˈkʌt/
 清楚的;明白无误的;显而易见的
clear or obvious without needing any proof
  She has clear-cut evidence that the company cheated her. 她有确凿的证据表明公司欺骗了她。 
 Opposites: indistinctunclear
 
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