Age structure is a foundational base to study the population dynamics.

In this paper , we study a nonautonomous SIS model with age structure.

研究具有年龄结构的非自治的SIS模型.

Age structure may also be represented by a survivorship curve.

存活曲线也可以反映年龄结构.

Age old wisdoms makes a timely return as humanity fast approaches it's epoch.

古老的智慧使及时返回人类快速方法的时代.

ALSO REMEMBER the age old boxing adage: LEAD WITH SPEED and FOLLOW WITH POWER!

同样的,记住那句古老的拳击格言: 快拳开路,重拳跟上!

The antique in my home is age old.

家里的这件古物已年代久远.

It's their faith that they will age old with each other till death.

他们的信念是一起变老,直到死亡.

An aged man can not walk very fast.

上了年纪的人,不能走得很快.

He is aged, but his memory is still good.

他已年老, 然而记忆力还好.

The plaintiff is aged 30 and has a normal expectation of life.

原告30岁,预期有正常的寿命.

He is an aged man.

他是一个老年男子.

Our family adopted a child aged eight.

我们家领养了一个八岁的孩子.

Bethan's round, rosy face seemed hardly to have aged at all.

贝唐红扑扑的圆脸看起来似乎一点也没有变老。

Please could you sponsor me for my school's campaign for Help the Aged?

我在参加我们学校举办的“助老”募捐活动，您能赞助我吗？

One boy, aged about 11, looks frozen with fright.

一个大约11岁的男孩吓得一动不动。

She has an aged parent who's capable of being very difficult.

她有一个年迈的父亲，可能会很不好相处。

He had always looked so young, but he seemed to have aged in the last few months.

他原来一直看起来很年轻，但最近几个月他显得老了。

We need to concentrate on our target audience, namely women aged between 20 and 30.

我们须针对我们的听众对象，即年龄在20到30岁之间的妇女。

All the attackers were male, aged between 25 and 30.

所有的攻击者都是男性，年龄在25到30岁之间。

They have two children aged six and nine.

他们有两个小孩，一个六岁，一个九岁。

In our country's agedness process, the problem of how to provide for the aged is prominent.

我国老龄化进程中的农村养老问题特别突出.