Police are investigating a series of violent rapes in the town.警察在调查镇上发生的一连串暴力强奸案。Why do so many rapes go unreported?为什么有那么多人被强奸后没有报案呢？The man who had committed several rapes was arrested.那个犯了多起强奸案的男人被抓起来了。There has been a decrease in the number of reported rapes.报案的强奸案数量已减少。