This Ain't A Love Song

如果你要翻译的话，这句话的意思是“这不是一首情歌”。
ain't 是美国黑人英语,“不是”的意思。
一般场合不太用，不太礼貌。

如果是指Bon Jovi的这首歌的歌词翻译的话，如下：

I should have seen it coming when the roses died
当玫瑰枯萎时，我早该发觉的
Should have seen the end of summer in your eyes
我早该看到你眼里的夏日已结束
I should have listened when you said good night
当你说晚安时，我早该听出来
You really meant good bye
你真正的意思是：再见！

Baby ain't it funny how you never ever learn to fall
宝贝，不是很好笑吗?你一直学不会跌倒
You're really on your knees when you think you're standing tall
你已屈膝跪下却自以为高高在上
But only fools are know-it-alls and I've played that fool for you
只有傻子才能明白一切，而我就为你扮演着那个傻子

I cried and cried every night
每晚我一次又一次哭泣
There were nights that I died for you baby
曾有多少夜晚，我愿为你而死，宝贝
I tried and I tried to deny it that your love drove me crazy baby
我一次又一次的尝试 想否认是你的爱使我疯狂

If the love that I got for you is gone
如果我对你的爱已逝