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  1. Walker Circulation

    美式

    • ph.
      沃克環流(熱帶太平洋的東西向大氣環流,在聖嬰現象發生時會被破壞)
  2. 知識+

    • o k的由來?

      ...scholarly debate for many years until Allen Walker Read showed that OK is ... recorded in 1839 but was probably in circulation before that date. During the 1830s there was...