"心不在焉，因知識活動而分心於現實," 1640年代，是 abstract（動詞）的過去分詞形容詞。相關詞彙： Abstractedly。
An absent man is one whose mind wanders unconsciously from his immediate surroundings, or from the topic which demands his attention; he may be thinking of little or nothing. An abstracted man is kept from what is present by thoughts and feelings so weighty or interesting that they engross his attention. [Century Dictionary]
一個 absent 的人是指他的思維無意識地遊離於他的周圍環境或需要他注意的話題之外； 他可能在想一些微不足道的事情。而一個 abstracted 的人是由於思想和感覺非常重要或有趣而分心，無法專注於當前的事務。[世紀辭典]
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