The pericardium consists of two distinct sublayers: the sturdy outer fibrous pericardium and the inner serous pericardium.
心包由两个不同的亚层组成：坚固的外纤维心包和内浆液心包。
The implementation methods and related algorithms of PCS, PMA and PMD sublayers are analyzed. The physical chips used in the design are also introduced.
该部分重点解释了千兆以太网的体系结构和协议规范，对PCS、PMA和PMD子层的实现技术和有关算法的设计思想进行了深入的分析；
The implementation methods and related algorithms of PCS, PMA and PMD sublayers are analyzed. The physical chips used in the design are also introduced.
该部分重点解释了千兆以太网的体系结构和协议规范，对PCS、PMA和PMD子层的实现技术和有关算法的设计思想进行了深入的分析；
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