supremacy
/su:ˈpreməsɪ; also, in ɑritish use, 英式英语读作 sju:-; su`prɛməsɪ/ n
~ (over sb/sth) [U]
being supreme; position of the highest power, authority or status 至高无上; 最高权力; 最高权威; 最高地位
achieve military supremacy over neighbouring countries 获得超越邻国的军事优势
challenging Japan's supremacy in the field of electronics 争夺日本在电子学领域中占据的领先地位
the dangerous notion of white supremacy, ie that white races are better than others and should control them 白人至高无上的危险观念（认为白色人种优於其他人种因而应成为主宰者）.