many moons ago 很久以前;好几个月以前

【例句】
I weighed no more than him myself at that age, but that was many moons ago.
我自己在那个年龄时体重是决超不过他的，不过那已是很久以前的事了。

I last rode a bicycle many moons ago.
我上次骑车还是很久以前了。