Editorial Note: This article is written with editorial review and topic relevance in mind.
Submit a sample of academic writing, e.g., a dissertation chapter. 防爆标志ex d iic t6 gb是一个详细的电气设备防爆标识，它由多个部分组成。 ex是中国及国际电工委员会的防爆标志，表示该设备遵循gb3836和iec60079的防爆标准。 d代. But what is the origin of the usage as a prefix in the words.
NYC murder suspect Sheldon Johnson pictured shaking hands with DA Alvin
Is short for exempli gratia, and is in common use to introduce an example within a sentence. Does ex have a full form? Google dictionary has this information about the origin of ex:
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