unprompted [ʌnˈprɑ:mptɪd]

例句:

• Quite unprompted, Sam started telling us exactly what had happened that night.
  萨姆完全出于主动，开始把那天夜里发生的事一一向我们说了出来。
  
• Such musings are not, of course, unprompted.
  这些想法并不是我突生出来的灵感.
  
• Unprompted, he threw his arms around her.
  来自NEWYORKER
• More than 10 per cent of heads 'made unprompted complaints'.
  来自Independent
• "In three years, I could be a failure," he said one night, unprompted.
  来自NEWYORKER