APEX
1.N-SING 单数名词（机构、体系的）最高地位，最高职位 The apex of an organization or system is the highest and most important position in it.
【搭配模式】：usuthe Nof n
At the apex of the party was its central committee.
该党的最高权力机构是中央委员会。
2.N-COUNT 可数名词尖端；顶点 The apex of something is its pointed top or end.
【搭配模式】：usu sing
...the apex of the pyramid.
金字塔的顶端
