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. During a bullfight, a drunk suddenly wandered into the middle of the ring.
    在一次斗牛时，一个醉汉突然踉踉跄跄地闯到斗牛场中间，

4. During the middle ages, Greek civilization declined and became effete.
    中世纪期间，希腊文明衰微且枯竭了。

5. During a bullfight, a drunk suddenly wandered into the middle of the ring.
    在一次斗牛时，一个醉汉突然溜达到斗牛场中间，

6. And when the middle of the afternoon came, from being a poor poverty-stricken boy in the morning, Tom was now rolling in wealth.
    汤姆早上还是身无一物的苦孩子，到了半下午成了大财主。

7. A person who would really like to live in a castle would probably be more at home in the Middle Ages.
    一个确实愿意住在城堡里的人，如果生活在中世纪可能会更自在。

8. A genetic trail visible on the maps shows that the breeding ground for this mixed population probably lies in Ethiopia or the Middle East.
    图谱上显示的遗传轨迹表明这一混血人种的发生地可能就在埃塞俄比亚或中东地区。

9. 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.

10. 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。