translation.en: But it's believed that the oldest living Redwoods are perhaps 2,500 years old -- roughly the age of the Parthenon -- although it's also suspected that there may be individual trees that are older than that.
translation.zh: 但是人们普遍认为最老的红杉 有2500岁——几乎跟帕台农神庙一样古老了 不过还有人怀疑 有比这更古老的红杉。