It's being used now to track where counterfeit drugs have been made, where banknotes have come from, to look at the provenance of antiques and see that they really did come from the place the seller said they did.
它被用来追踪 假药在哪里制造的， 钞票从哪来的， 察看古董的出处 认定它们确实是来自 卖方说的地方。