polar
形容词 polar:
having a pair of equal and opposite charges
characterized by opposite extremes; completely opposed
同义词:diametric, diametrical, opposite
located at or near or coming from the earth's poles
of or existing at or near a geographical pole or within the Arctic or Antarctic Circles
extremely cold
同义词:arctic, frigid, gelid, glacial, icy
being of crucial importance
同义词:pivotal