A new way to study investigation is to make qualitative and quantitative analysis, study and evaluation to the investigation efficiency from the Angle of economic cost.
从经济成本角度定性和定量分析、研究和评价侦查效益，是侦查学研究的新方法之一。
E-mail efficiency is promoted, while the organization is shielded from allegations that records were destroyed following the initiation of a lawsuit, audit, or investigation.
当公司不再声称邮件记录由于遵照起初的诉讼、审计和调查而受到破坏时，电子邮件的效率就提高了。
We present one protocol called MAAL3, which has advantages of AAL3/4 and AAL5, and give a comparison's investigation about function and transmission efficiency for these three protocols.
在此基础上，提出了一种具有AAL3／4、AAL5协议优点的MAAL3协议，并对这三种协议的功能、传输效率进行了比较研究。
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