once upon a time
1．long ago从前；很久以前
Once upon a time there dwelt a fisherman on the lakeside．从前湖边住着一个渔民。
Once upon a time there lived a king who had an ugly daughter．从前有一位国王，他有一个丑陋的女儿。
2．sometime before now以前
Once upon a time she was thought to be the most talented actress in the country．以前她被认为是该国最有才华的女演员。