资料来源 : pyDict

中年的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Middle-aged \Mid"dle-aged`\, a.
   Being about the middle of the ordinary age of man; between 30
   and 50 years old.

资料来源 : WordNet®

middle-aged
     adj : being roughly between 45 and 65 years old