until the end of something, especially a war直到結束（尤指直至戰爭結束）(informal)for a very long time(非正式)長期地
英語四級真題
For example, sleep duration has declined from some eight hours in the 1950s to seven in recent years.
2016年6月四級真題（第一套）聽力 Section C
Participants were balanced across the three groups for age, sex, educational background, severity and duration of depression, and use of antidepressant.
2019年6月四級真題（第三套）閱讀 Section C
柯林斯高階英漢雙解學習詞典釋義
N-UNCOUNT
(某事件或狀態的)持續時間,期間
The duration of an event or state is the time during which it happens or exists.