upon a time的用法和樣例：
例句
- Once upon a time there was a princess.
從前有一個公主。 - Once upon a time there was a beautiful princess ...
從前有個美麗的公主 ... - Once upon a time, there was an old man living in a small village.
從前，在一個小村莊里住著一位老人。 - Once upon a time, there lived a princess who was very beautiful.
從前，有一位非常美麗的公主。
