... (SQFP) package, shrink quad flat 缩小四方扁平封装 Physical Medium 物理媒介 PMA post-metallization annealing 金属化后 退火 ...
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physical medium dependent 物理介质相关子层 ; 物理媒体相关 ; 物理媒体相关子层 ; 物理媒质依赖子层
physical medium dependent sublayer 物理介质相关子层 ; 物理媒体相关子层
physical medium attachment 物理介质连接
PMA-Physical Medium Attachment 物理媒体附属装置
physical medium attachment sublayer 实体媒体附接子层
physical medium dependent specification 实体媒体相依规格
PMD D Physical medium dependent 物理介质相关子层
physical medium attachment pma 物理媒体连接 ; 物理媒质连接子层
PMD Physical medium dependent 物理介质相关子层
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Change is least likely in the physical medium of books.
书的物理介质不太可能发生变化。
The spatial relationships that are brought into being by knowledge of writing are constrained by physics, of course — after all, writing is a physical medium — but they are in no way grounded on it.
因为写作内容而形成的空间联系虽然受限于物理条件（毕竟写作是一种物理媒介），但却肯定不是以物理条件为基础形成的。
They imagined the existence of a physical medium - the ether - filling all of space.
他们想象存在一种充满整个空间的物理介质——以太。
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