pre·mon·i·to·ry /prɪˈmɑnəˌtori, ˌtɔr-/
  (a.)預告的,前兆的,前驅性的
  pre·mon·i·to·ry /prɪˈmɑnəˌtorɪ, ˌtɔr-/ 形容詞
  先兆的,預兆的
  Pre·mon·i·to·ry a.  Giving previous warning or notice; as, premonitory symptoms of disease. -- Pre*mon*i*to*ri*ly adv.
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  premonitory
       adj : warning of future misfortune [syn: precursory]