MAC - multipole sub - array acoustic log is an advanced logging technology.

多极子阵列声波技术是目前较先进的测井技术。

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This paper studies the several key issues of media access control (MAC) layer of EPON, including MAC control sub-layer and RS sub-layer.

本文主要对EPON的媒体接入控制(mac)层(包括MAC控制子层和RS子层)中的若干关键问题进行了深入的研究。

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Moreover, the government-sponsored enterprises Fannie Mae and Freddie Mac spent several trillion dollars buying securities that were bundles of sub-prime mortgages.

FORBES: Why Government Spending Is Bad For Our Economy