呢個英文係咩意思

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BOREALIS 係 aurora borealis o既簡稱，等於北極光！
merriam webster 網上字典有呢個解釋 ：
an aurora that occurs in earth's northern hemisphere -- called also northern lights
中譯：於北半球發生的極光，又稱為 nothern lights

B-O-R-E-A-L-I-S = 北極

Main Entry: borealis
Part of Speech: adj
Definition: pertaining to the north or north wind; also short for [aurora borealis]
Etymology: from Latin boreas

from dictionary.com