the middle-aged and the old

• 中老年

the middle-aged and the old的用法和样例：

例句

1. Study on the correlations between serum estrogen level and heart function of coronary heart disease and the evaluation of exercise test in the middle and aged women.
   中老年妇女血清雌激素水平与冠心病心功能相关性及运动试验诊断价值的研究。
2. So it is very necessary to pay more atten-tion to the development of the adult garments and study the garment requirements of the old andmiddle-aged people.
   还要引导中老年对服装消费的动机和行为。