1. Three are young lads, one is middle-aged and one is elderly.
    他们中三个是年轻小伙子，还有一位中年乐手和一位老年乐手。

2. He is a generous middle-aged man.
    他是一个慷慨的中年人.

3. Suddenly, a middle-aged lady came into our compartment and sat opposite Sally.
    突然, 一个中年妇女走进我们的小间, 坐在莎利对面.

4. Suddenly, a middle-aged lady got on the train and sat opposite Sally.
    突然，一个中年妇女上了火车，坐在萨莉的对面。

5. Measurements made by Arthur Kramer at the University of Illinois demonstrated that inactive adults, aged 63 to 82, could hit buttons faster in response to a tone after they went through a 10-week water exercise course.
    伊利诺伊大学阿瑟·克雷默测量的结果证明，63至82岁的不运动的成年人，在完成为期十周的水上运动课程之后，听音击键的反应加快了。

6. Iron deficiency is very common among women in general, affecting one in four female teenagers and one in five women aged 18 to 45, respectively.
    缺铁在多数女性中是很常见的，十多岁的少女四人中有一人缺铁，18至45岁的女性五人中有一人缺铁。

7. In Wolf's study, published in May 1996, 215 seniors aged 70 to 96 were divided into three groups.
    在沃尔夫1996年5月发表的研究中，215名70至96岁的老人被分成三组。

8. Who studied 301 men and women aged 70 and older with at least one risk factor for falling, such as muscle weakness or use of certain medicines.
    她调查了301名70或70岁以上的男女，他们都至少有一种导致摔跤的风险因素，如肌肉无力或使用某些药物等。

9. From out of this grayness, two figures approach us — an unremarkable middle-aged man and woman —
    有两个人影从这一片灰色中走近我们——一个不起眼的中年男子和一个女人。