unawares [ˌʌnəˈwerz]

例句:

• Sometimes our expectations sneak up on us unawares.
  有些时候，我们期待的事情会不期而至。
  
• Investors and currency dealers were caught completely unawares by the Bundesbank's action.
  投资者和外汇交易商被德意志联邦银行的这一举措打了个措手不及。
  
• The camera had caught her unawares .
  她毫无防备地被拍摄下来。
  
• So great a master having fallen unawares into an error.
  来自J. Bentham
• The credit troubles took the Fed unawares.
  来自WSJ
• Mr. Myers is being careful not to get taken unawares again.
  来自WSJ