many a good cow has a bad calf
01
used to emphasize that even a successful and capable individual can produce an offspring or product that is inferior or unsuccessful
Proverb
例子
The chef was known for her delicious dishes, but even she had a few failed experiments, showing that many a good cow has a bad calf.
The parents were both highly successful doctors, but their son struggled in medical school, proving that many a good cow has a bad calf.
