There have been independent evaluations supported by the Justice Department and by the CDC and performed by Johns Hopkins that have shown 30-to-50-percent and 40-to-70-percent reductions in shootings and killings using this new method.
我们的实验被独立评估过。 这个评估是由司法部门和 疾病预防控制中心支持，由约翰霍普金斯大学来实行的。 评估结果显示我们的实验把枪击案和杀人案 这是采用新方法做到的。