translation.en: I had also had the privilege since the last 37 years to work on several masterpieces as you can see behind me, but basically to do what? Well, to assess, for example, the state of conservation. See here the face of the Madonna of the Chair that when just shining a UV light on it you suddenly see another, different lady, aged lady, I should rather say.
translation.zh: 我非常荣幸在过去的37年里 可以为这些杰作而工作，您可以看到他们就在我身后， 不过您知道我的工作到底是什么吗？ 其实，就是对他们进行检验，比如 这件稀世珍宝。看这里 “椅子上的麦当娜” 当紫外线照在这位女士脸上的时候 你会突然看到另一位，不同的女士 年长的女士，我应该这么说。