求翻译：我的母亲是一位医生，她现在在一家著名的医院工作。我的母亲她出生于1968年，她22岁大学毕业，毕业后她当了医生是什么意思？

My mother is a doctor, she now works for a famous hospital. My mother, she was born in 1968, she graduated from the age of 22, after graduation, she became a doctor