1.school shooting 校园枪击案
例句：On the twentieth, America suffered another horrible school shooting.
20日，美国又发生了另一起严重的学校枪击事件Y)p7o3fG1dmql7。
2..cut ties with 与...切断联系
例句：The political landscape has already deteriorated so far that China cut ties with America due to its “unstable government.
其政治背景已经极度恶化，以至于中国与其断交因为其“不稳定的政府”7.xagt8YnTmbhz。
3.assault rifles突击步枪
例句：Their firearms were also inappropriate - some had pistols, some had assault rifles.
他们的枪械也不适用 - 一些带手枪，一些携突击步枪Gi=#9rzz6x+A6_+*^3。