original evidence meaning in Chinese

原始凭证

Important original evidence shall be kept for a period of not less than 20 years
重要的原始凭证的保存期不少于二十年。
Article 153 a securities registration and clearing institution shall carefully preserve the original evidence relating to registration , custody and clearing
第一百五十三条证券登记结算机构应当妥善保存登记托管和结算的原始凭证。
Usually , the amount of original evidence data , which is collected from so many sources and in different file formats , is massive . so , a key problem in the field of computer forensics , which needs to be solved , is how to analyze the evidence in effective methods and obtain the useful information to aid the investigation
计算机取证收集的电子证据往往是海量的，而且来源复杂，格式不一，因此如何对这些量大繁杂的数据进行有效的分析，提取有助于案件侦破工作的证据，是计算机取证领域面临的关键问题之一。