corroboration
n[U]
confirmation or support by further evidence, esp from a different source; additional evidence 進一步的證實(尤指另有來源的); 進一步的證據
His possession of the gun is corroboration of his guilt. 他藏有槍是他犯罪的又一證據.
In corroboration of his story (ie to give support to it) he produced a signed statement from his employer. 為了進一步證明他所說的是事實, 他出示了一份雇主簽了字的文件.