Grammar books usually divide the definiteness of articles into two types: general reference(s) and specific reference(s).
通常的语法书把冠词的限定性分为两种:泛指和特指。
参考来源 - 从关联理论分析英语冠词的限定性·2,447,543篇论文数据,部分数据来源于NoteExpress
They reported on this same trend in 2006, with specific reference to Chinese nannies.
他们曾在2006年报导了同一趋势,还特别提及会说中文的褓母。
The action should occur after the specified time interval from a specific reference point.
行为应该从指定参照点的指定时间间隔之后发生。
The document makes no specific reference to enemies hacking into drone feeds to monitor or control the planes.
该文件没有具体提到敌人入侵进无人机去监测或控制飞机。
So, you assign values to very specific states of matter and call those the reference points for your temperature. For instance, freezing of water or boiling of water, the standard ones.
那么你对物质的,某些特殊状态指定数值,把它们叫做你的温度的参考点,比如水的冰点或沸点,它们都是标准。
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