名词短语
中文翻译：心不在焉
同义词：
['lack of mind', 'distracted', 'absent-minded']
例句：
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1. She was so absorbed inher work that she didn't noticethe time had passed.
她全神贯注于工作，以至于没有注意到时间已经过去了。
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2. He was absent-minded and forgotto bring his homework home.
他心不在焉，忘记带作业回家了。
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3. The teachernoticed the student was absent-minded and gave him awarning.
老师注意到那个学生心不在焉，给了他一个警告。