The middle-aged person, Barth continued, can see death in the distance, but moves with a "measured haste" to get big new things done while there is still time.
2017年6月四级真题（第一套）阅读 Section C
The survey finds that, in spite of the dramatic gains women have made in educational attainment and labor force participation in recent decades, young women view this as a man's world—just as middle-aged and older women do.
2018年6月四级真题（第三套）阅读 Section C
柯林斯高阶英汉双解学习词典释义
ADJ
中年的
If you describe someone as middle-aged, you mean that they are neither young nor old. People between the ages of 40 and 60 are usually considered to be middle-aged.
If you describe someone's activities or interests as middle-aged, you are critical of them because you think they are typical of a middle-aged person, for example by being conventional or old-fashioned.