a happy moment的用法和样例：
- It was a happier moment than I'd had in weeks.
- Last night during a break in our recording session everybody was watching Germany vs Sweden.As I snacked and watched, I felt like this was a happy moment for humanity.
- A happy moment is always short.
- A happy marriage depends largely on give and take.
- What is the most joyful and happy moment in a day?
- The newly married couple are really a happy pair.