Yahoo香港字典 搜尋

登入
  1. 更多

搜尋結果

  1. Oxford American Dictionary

    microwave background

    • IPA[ˈmīkrəˌwāv ˈbakˌɡround]
    • n.
      a weak uniform microwave radiation which is detectable in nearly every direction of the sky. It is believed to be evidence of the Big Bang.

    • noun: microwave background, plural noun: microwave backgrounds