趣味青春英语 第98期:Nick of time(在线收听

   Idiom:

  nick of time 关键时刻出现,千钧一发,恰好时刻
  Hit the book:
  Volcano
  Volcanologist
  Erupt
  Core
  Liquid
  Mantle
  Magma
  Crust
  Plate
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