unforced [ʌnˈfɔ:rst]

例句:

• School discipline must be unforced strictly.
  教学纪律必须整顿.
  
• Absence of pretense artificiality, full creative intent unforced.
  没有虚伪做作,充满无限的创造意图.
  
• The unforced error count from Tomic was unbelievably low in the first set.
  从托米奇非受迫性错误数是令人难以置信地低,在首盘.
  
• Our unforced error rate was far too high.
  来自BBC
• There were a lot of errors today that were unforced.
  来自BBC
• Errani only had one unforced error in those six games.
  来自THETIMES