Back in the day you know you let me down

从前你知道让我受伤

Let down放低； 放下； 使失望； 失信

例句：

Sadly, the film is let down by an excessively simple plot.

遗憾的是，过于简单的情节使得这部电影差强人意。

He let down the tailgate so the dog could jump out.

他放下后背门，好让狗跳出来。

But then to be let down like that, oh it's so unfair!

但是接下来竟让人如此失望，唉，这真不公平！

Thought maybe I finally figured you out, 'cause

幻想自己终究会弄清

Figure out 计算出； 弄明白； 解决； 想出

例句：

They're trying to figure out the politics of this whole situation.

他们正试图弄明白整个情形背后的权术争斗。

I can't figure out what he was hinting at.

我想不出他在暗示什么.

Please figure out the total cost.

请算出总费用.