inconstancy [ɪnˈkɑnstənsi]

例句:

• The inconstancy of a crowd goaded by rhetoric.
  来自P. Ustinov
• It's inconstancy, but not inability, that's to be feared.
  不怕无能, 就怕无恒.
  
• Hermia was looking at him and wondering at his strange inconstancy.
  赫米亚望着他,对他莫名其妙的反复无常感到很惊奇.
  
• It must be a confession of his inconstancy and confirm their separation forever.
  这无非是他那轻薄行为的招供,以及他们一诀永别的判决.