perpetuity信息详情
n.永恒
perpetuality───永久性
perpetuate───v.使持续，使长存，使永久化（尤指不好的事物）
in perpetuity───永远地
perpetuities───n.[劳经]永续年金；终身年金
perpetually───adv.永恒地，持久地
perpetuated───v.使持续，使长存，使永久化（尤指不好的事物）
perpetuates───v.使持续，使长存，使永久化（尤指不好的事物）
perpetuator───n.永久保存的人
perspicuity───n.（语言、文章、表达等的）明晰；简明
So we have sufficient reason to carry forward and further develop it in perpetuity.───我们有理由永远把它继承并发扬光大。
They do not own the land in perpetuity.───他们并不永久拥有这片土地。
The U.S. government gave the land to the tribe in perpetuity.───美国政府将这块土地永久性划拨给该部族。
But your percentage of the annual haul was fixed, and this piece of paper entitled you to it in perpetuity.───但是你每年捕捞量的百分比份额是固定的，并且这张文书保证你的永久捕捞权。
They had to be comfortable with the fact that they were going to appear in public, perhaps in perpetuity.───他们必须要对即将出现在公众面前或是成为永恒而感到自然。
Just because a rule is enforced with a lack of common sense in the past does not mean it must be enforced unreasonably in perpetuity.───仅仅因为在过去坚持这样一条缺乏常识的规则，并不意味着这条规则就需要永远被执行下去。
Ratcheting up the time limit on a regular basis becomes a reasonable way of approximating that perpetuity.───定期地逐渐抬高保护年限是接近永久保护的不错方法。
If the payments are made over an infinite period of time the annuity is called a perpetuity.───假如支付期是无限的，称为永久年金。
Such toil will no doubt continue in perpetuity .───这种辛劳无疑是永久持续的。
These lands had been granted to the family in perpetuity.