[Story] Once upon a time, there was a person who was always happy. They would put on their favorite app and instantly feel joyful. The apps output would make them smile every time.

[参考翻译] 从前，有一个总是很快乐的人。他们会使用自己最喜欢的应用程序，并立刻感到快乐。应用程序的输出每次都会让他们微笑。

[Words]

  1. apps [æps] n 应用程序, 应用
  2. happy [ˈhæpi] adj 快乐的, 愉快的
  3. output [ˈaʊtpʊt] n 输出, 产物
  4. put [pʊt] v 放, 放置
  5. upon [əˈpɒn] prep 在…之上, 在…时候