insurmountable [ˌɪnsərˈmaʊntəbl]

例句:

• Lack of money has proved an almost insurmountable obstacle.
  资金不足已成为一个几乎无法逾越的障碍.
  
• No difficulty is insurmountable if one sets one's mind on it.
  精诚所至,金石为开.
  
• The age barrier appeared insurmountable.
  年龄障碍看来是无法逾越的.
  
• But we do not see any insurmountable challenges.
  来自SA
• This is certainly true, but they are not insurmountable.
  来自SA
• For many would-be entrepreneurs, money is the insurmountable hurdle.
  来自WSJ