a bright spot on the parhelic circle; caused by diffraction by ice crystals.
出在太阳旁边一个常常形成光明光斑;是由于冰晶衍射造成。
a bright spot on the parhelic circle; caused by diffraction by ice crystals.
出在太阳旁边一个常常形成光明光斑;是由于冰晶衍射造成。
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