我听说过一些在美国校园里死于枪杀案件的翻译：I've heard of some United States campuses died in shooting case 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I've heard some of the campus, shot to death in the U.S. case

I've heard of some United States campuses died in shooting case

I had heard some die in the American campus in guns down the case

I have heard some in the United States die from gun cases campus

I've heard of some United States campuses died in shooting case