punchline
noun [ C ] uk/ˈpʌntʃ.laɪn/ us/ˈpʌntʃ.laɪn/
（故事或笑话的最后部分点题或抛出笑料等的）妙语，画龙点睛的结尾句
the last part of a story or a joke that explains the meaning of what has happened previously or makes it funny
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。