absentmindedly

例句：

1. 1.She was absentmindedly reading a book in the park.
   她在公园里心不在焉地读着书。
2. 2.He was absentmindedly eating his lunch in the office.
   他在办公室里心不在焉地吃着午餐。
3. 3. The student was absentmindedly answering questions during the exam.
   这个学生在考试中心不在焉地回答问题。