You kept your Social Security card and you pasted stamps on it that proved that you paid it.

你取得社会保障卡,并将邮票贴在上面,以此来证明你已支付过钱。

耶鲁公开课 - 金融市场课程节选

You know what that means when they're framed there on the wall with their coupons still attached?

你知道吗,当债券陈列在墙上,而息票还贴在上面的时候

耶鲁公开课 - 金融市场课程节选