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1. Oxford American Dictionary

   die-off

   • n.
     a period in which a significant proportion of a population dies naturally, usually within a short time.；a process causing die-off.

   • noun: die-off, plural noun: die-offs

2. • 釋義

   n.

   名詞

   • 1. a period in which a significant proportion of a population dies naturally, usually within a short time.
   • ▪ a process causing die-off.
   • ▪ the death of a significant proportion of a population from die-off.