school of hard knocks片語KK [skul ʌv hɑrd nɑks] /skul ʌv hɑɹd nɑks/發音片語1社會大學、艱苦歷練、人生磨練口語He never went to college; he learned everything in the school of hard knocks.他沒上過大學,一切都是在社會大學裡磨出來的。