英语翻译It was I who had lost something beautiful,and it was I who would never allow myself to do such a thing again.

英语翻译It was I who had lost something beautiful,and it was I who would never allow myself to do such a thing again.
英语翻译
It was I who had lost something beautiful,and it was I who would never allow myself to do such a thing again.

英语翻译It was I who had lost something beautiful,and it was I who would never allow myself to do such a thing again.
正是我自己之前失去了一些美好的东西,并且也正是我将决不允许自己再做出这样的事情了.

是我遗失了一些美好的事，也是我以后再也不让自己做出这样的事了。

it just doesnt pay to be a good guy.

是我曾经遗失了美好的东西，而我将永不重蹈覆辙。

动词用的WAS很奇怪，应该是过去式或者假设句。
大概是这个意思“我曾经痛失了美好的东西，下一次我决不允许自己再犯同样的错误。”

是我使自己丢失了某些美丽的东西，也是我将再也不会允许我自己做一次这样的事情

当我失去一些美好的东西，我将不允许这样的事情再次发生（意思就像我们俗话说的，直到失去了，才懂得珍惜吧）

我曾失去了一些美好的东西，以后再也不允许自己这样做了。

那是我犯的一次错误，我永远不会允许自己再去犯同样的错误。

我曾失去的美好将使我永不重蹈覆辙。