blackboard jungle
noun [ U ] uk/ˌblæk.bɔːd ˈdʒʌŋ.ɡəl/ us/ˌblæk.bɔːrd ˈdʒʌŋ.ɡəl/
(学校学生)无组织无纪律状态
the way of life and activities connected with schools, especially when considered as difficult and confusing
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