这是美国有史以来最严重的一次校园枪击事件。

This is the deadliest university shooting in American history.

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小型武器国际行动组织同样也关注发生在其他80个国家的校园枪击事件。

IANSA also looks at school shootings in 80 other countries.

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马塞诸塞州的两名父亲发明了防弹书包。这种书包内置一防弹板，保护学生在校园枪击事件中免遭伤害。书包售价为175美元。

Two Massachusetts fathers have created a bulletproof backpack. The bags feature a ballistic panel inside, helping protect students during a school shooting. The backpack sells for 175 dollars.

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