1、long long ago英[lɔŋ lɔŋ əˈɡəu]美[lɔŋ lɔŋ əˈɡo][词典]很久很久以前;[例句]Long long ago, there were four great inventions.很久很久以前，就有了四大发明。

2、a long time ago英[ə lɔŋ taim əˈɡəu]美[e lɔŋ taɪm əˈɡo]adv.很久以前; 悠远;[例句]He must have started writing his book a long time ago.他一定很久以前就开始写这本书了。

3、long time ago英[lɔŋ taim əˈɡəu]美[lɔŋ taɪm əˈɡo]adv.很久以前;[例句]In my neighbourhood, the local crack dealers would have taken him out a long time ago. 我们这片的本地毒贩早就想废了他了。

4、once upon a time英[wʌns əˈpɔn ə taim]美[wʌns əˈpɑn e taɪm][词典]从前;[例句]Once upon a time, there lived an old man who had two beautiful daughters.从前，有一个老人，他有两个美丽的女儿。

5、long long time ago网络很久很久以前; 潘神的迷宫;[例句]In fact this process of aging, started long long time ago, from when I just grew up to a young girl, at age18 而我的衰老，从很早的时候就已经开始了，在我还刚刚成长为少女的时候。十八岁？