precedence
/ˈpresɪdəns/noun
mass noun
1- the condition of being considered more important than someone or something else; priority in importance, order, or rank优先权; （重要性, 顺序, 头衔）领先; 居前：
his desire for power soon took precedence over any other consideration.
争得权力很快就成了他的首要考虑。
1.1
- the order to be ceremonially observed by people of different rank, according to an acknowledged or legally determined system（依惯例或法定程序的）先后顺序：
quarrels over precedence among the Bonaparte family marred the coronation.
波拿巴家族关于排名先后的争吵把加冕典礼弄得一团糟。