Doctor Rivers was charged with unprofessional conduct and improper use of dangerous drugs.瑞弗斯医生被指控行为违法职业行为准则，并且不当使用危险药物。The speaker tried to impress the dangers of drugs on the children. = The speaker tried to impress on the children how dangerous drugs can be. 发言人力图让孩子们清楚地了解毒品的危害。