c. 1600, from Latin apex "summit, peak, tip, top, extreme end;" probably related to apere "to fasten, fix," hence "the tip of anything" (one of the meanings in Latin was "small rod at the top of the flamen's cap"), from PIE *ap- "to take, reach." Proper plural is apices.
权威例句
1. 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. The apex of the flames licked the crimson sky.
火焰的舌尖舔卷着绯红色的天空。
3. The Apex fare is £195 return.
优惠往返机票价格为195英镑。
4. He reached the apex of power in the early 1930 s.
他在三十年代初达到了权力的顶峰.
5. Spring was the real apex of the year; summer was bathos.