It's funny you ask that because I never have this moment when I feel, "Ah, I've finished!" I watch footballers at the end of the match, you know, the whistle goes and they've won or lost.
2017年6月六级真题（第一套）听力 Section A
柯林斯高阶英汉双解学习词典释义
EXCLAM
（书面语中用于表示在交谈时作出回应或引起他人注意或表示惊讶、失望）啊
Ah is used in writing to represent a noise that people make in conversation, for example to acknowledge or draw attention to something, or to express surprise or disappointment.