culmination
/ˌkʌlmɪˈneɪʃən/noun
in sing.
1- the highest or climactic point of something, especially as attained after a long time（尤指通过长期努力达到的）顶点; 高潮：
the deal marked the culmination of years of negotiation.
这笔交易标志着数年谈判的高潮。
1.1
- archaic or Astrology the reaching of the meridian by a celestial body〈古〉【占星】（天体的）达于中天。