thoughtlessness [ˈθɔtlɪsnɪs]

例句:

• What women mistake as thoughtlessness is often just diffidence.
  女性误以为是考虑不周的事情往往只是缺乏自信。
  
• He repented his thoughtlessness.
  他后悔自己的轻率.
  
• Everything listened to the singing larks in brooding thoughtlessness.
  周围的一切都忘情地静听着云雀的歌唱.
  
• Then, one day, the new girl was gone, and the Minotaur worried that, in a moment of thoughtlessness, he had gobbled her up.
  来自NEWYORKER