Interestingly, the mortality rate in New York turned up being lower than in many Amercian cities.
Historians believe this was because authorities closed the subway after quickly recognizing the dangers of keeping it open.
1) 麻烦老师讲解一下turned up being lower
2) dangers 可否改用danger, 二者含义理解上的差别是什么?
《高考英语备考1号·速效编》
《高考英语备考1号·写作编》
《高中英语晨读晚记》
《高中英语错题笔记》
《零起点考大学英语》