The effect of diffusion on the permanence of the population in a polluted patch is studied by setting up a single population diffusive system in two patches.
文中所考虑的是污染斑块上外界毒素的输入量存在极限值的情形 ,得到如下结论 :无扩散时 ,若此极限值超过某一定值 ,则污染斑块上的种群趋于灭绝 ;扩散存在且两斑块上种群的扩散系数满足一定的条件时 ,则可使该系统的种群永久生存或灭
The Effect of Diffusion on the Permanence of Smith Population in the Polluted Patch;
文中所考虑的是污染斑块上外界毒素的输入量存在极限值的情形,得到如下结论:无扩散时,若此极限值超过某一定值,则污染斑块上的种群趋于灭绝;扩散存在且两斑块上种群的扩散系数满足一定的条件时,则可使该系统的种群永久生存或灭绝。
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。
Gold and silver jewellery is permanently inflation-proofed in value.
金银珠宝，永久保值。
purchase in perpetuity
购买永久持有权年数
"It's called evergreen. It's always like that."
“这花叫‘万年青’，永久这样!”
Interest derived from a named endowment of HK$500,000 would be sufficient to award a scholarship of HK$20,000 each year in perpetuity.
设立五十万港元之永久命名基金，每年收益足以颁发一个?赏蚋墼?慕毖Ы鹈?睢
Jockey Club Grant for Permanent Recreational Facilities for Youth
赛马会青少年永久康乐设施拨款
every adult permanent resident will be eligible to vote.
所有成年的永久性居民都有资格投票。
Actiones perpetuae
永久诉讼，永久诉权
From the economic point of view, working capital is made up of the net current assets and permanent short-term liability.
经济学视野下营运资金为永久性流动资产,即一般意义上的营运资金与永久性流动负债之和。
An endowed fund is a gift made to the Permanent Fund of The Rotary Foundation of RI.
一项捐助基金是一种赠予国际扶轮扶轮基金会之永久基金。
He had smoked for so many years that his teeth were permanently stained yellow.
他吸了那么多年烟，牙齿都被永久地熏黄了。
The council relocated its Information Centre to its new permanent office during the year.
年内，该局把资讯中心搬迁到新的永久办事处。
We must keep our old democracy forever young.
我们必须使我们历史悠久的民主制度永远年轻。
Navigation through permanent ship locks and operation of the first group of generators will begin in 2003.
2003年实现永久船闸通航和首批机组发电
The committee produced its Articles of Confederation and Perpetual Union in 1776.
该委员会于1776年完成了《联邦及永久联合条例》。
The draft law on real concerns: the possibility of change of land use rights for70 years permanent?
关注物权法草案:70年土地使用权可否变永久性?
Fifty-one cases of permanent pacemaker implantation in patients with 5-year clinical follow-up analysis
51例植入永久性起搏器患者5年临床随访分析
As with all Permanent Fund gifts, the gift itself is not spent.
如同所有的永久基金的捐赠，捐赠的本金是不会花用掉。