对于那些习惯了等待，等待网页加载，等待文件出现的移动一族来说，使用4G就像是呼吸新鲜空气一般的全新感受。
Using 4G can feel like a breath of fresh air for mobile workers who are accustomed to waiting and waiting for Web pages to load and files to appear.
在美国，11月23号，本周三，也就是感恩节的前一天，对工作一族来说，十分无聊。他们待在办公室里，推开桌上的文件，无精打采地消耗着时间，盼望节日早点到来。
The day before Thanksgiving is generally a dull time in American offices, as workers lackadaisically shove papers around their desks until it is time to knock off early for the holiday.
本文基于PL IB标准，建立了面向零件族的零件库信息模型，并在中性文件上得到了实现，为零件库信息模型更高层次的实现提供了基础。
Based on PLIB, an information model of parts family is put forward and is represented by a neutral file. The paper provides a basis to realize PLIB on a higher level.
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