文化：多年前廉價(jià)拍售的畫疑出自達(dá)芬奇之手
A painting purchased for 20,000 dollars at an art auction a couple of years ago, maybe an undiscovered work by Leonardo Da Vinci. A forensic expert says fingerprint on the painting may prove that it’s the first major work from Da Vinci discovered in about a century. If it is, that 20,000 dollar purchase could be worth 150 million dollars.