We're going to begin by listening to Chris Coover, a person who works for one of the more famous auction houses – companies that auction off art and other valuable documents.

我们将从聆听克里斯·库弗 (Chris Coover) 的讲话开始，他供职于最著名的拍卖行之一——拍卖艺术品和其他有价值文件的公司。