例如，当一项澄清衍生品交易法律问题的议案在2000年获准通过时，衍生品交易早已进行地如火如荼。
Trading of derivatives, to take one example, began to soar well before a law was passed in 2000 that clarified some of the legal questions about them.
而大量的古玩买家，如博物馆则努力地使公众相信某件艺术品并非通过偷盗或非法出口而获得，从而在法律上证明他们对某件艺术品的拥有权。
Respectable buyers such as museums try to ensure a legitimate provenance, or origin, for an artifact by establishing that it has not been stolen or illegally exported.
这种轧差通过一个中央订约方（如清算所）在法律上作为每一个卖方的买方，以及每一个买方的卖方而实现。
Such netting is conducted through a central counterparty (such as a clearing house) that is legally substituted as the buyer to every seller and the seller to every buyer.
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