ironclad [ˈaɪənˌklæd]

例句:

• That is an ironclad fact that is beyond controversy.
  这是铁的事实,无庸置辩.
  
• These ironclad details are irrefutable proof in black and white.
  白纸黑字,铁证如山.
  
• The case for testing now is ironclad.
  正在接受检验的这一论据牢不可破。
  
• It was the first battle between two ironclad ships.
  来自WSJ
• "We should not be taking ironclad positions," he said.
  来自VOA
• You know you got an ironclad contract...and I can't fire you.
  来自M. Puzo