These piles of organic material can sit undisturbed for long periods, potentially concealing old metal, which rusts over time.

这些有机物堆积起来可以长时间不受干扰地存在，可能隐藏着旧金属，而旧金属会随着时间的推移而生锈。

'Could I have the old metal lamp that's in the cupboard under the stairs? 'she asked her mother.

“我可以拿一下楼梯下橱柜里的旧金属灯吗？”她问母亲。

And that's on top of me going to the old metal factory that's been shut off, but it's still home to some two dozens of stray animals.

除此之外，我还去了一家关闭的废旧金属厂，但那里仍然是大约20多只流浪动物的家。

Which basically means " or any old metal thing you're selling." This last bit has become the recordings namesake, Fierro Viejo–literally " old iron." The recording started popping up in neighborhoods surrounding the capital city in the early 2000s.

这基本上意味着“或您正在出售的任何旧金属物品”。最后一点已成为录音的同名词，Fierro Viejo——字面意思是“老铁”。 2000 年代初期，这段录音开始在首都周边地区出现。