perpetuities

基本解释

The present value of this annuity is, therefore, the difference between the values of the two perpetuities.
使用年金桌子的現在價值是比較簡單的方式。
The only difference between the two perpetuities is that the first one also provides a cash flow in each of the years 1 t.
這兩者之間的唯一區別是前者也提供了一個從1年到t 年每一年的現金流。
There have also been one hundred-year bonds and there have also been perpetuities that--in the UK, for example, the British Consoles--have no expiration date and they have infinite maturity.
也有長達百年的債券，甚至有永久債券--比如在英國，不列顛控股，沒有過期時間，永不到期。

There have also been one hundred-year bonds and there have also been perpetuities that-- in the UK, for example, the British Consoles-- have no expiration date and they have infinite maturity.
還有更長期的一百年債券,還有一種永續年金,比如說英國的大英統一公債,沒有過期日,永不到期
耶魯公開課 - 金融市場課程節選

When the GST was originally enacted, most state laws included the common law Rule against Perpetuities (RAP) or some similar rule.
FORBES: Obama Estate Tax Budget Proposals