最近儿童袭击案频发，今天和大家总结一些相关词汇：

A surge of attacks against children：激增的儿童袭击案

official pledges of stepped-up security：官员承诺加强安保 stepped-up:加强的

stop the bloodshed：停止流血事件

assailant：袭击者 （注意：和assassin 的区别，这个词表示暗杀者）

rampage：狂暴行为

enforce access controls:加强入校管理

虽然这些袭击案没有直接联系，但是还是有一些共同点：

There are no direct links between the attacks, but the cases have similarities. The assaults have all been carried out by middle-aged men who acted alone, and at least three of the attackers had known mental health problems. The number of attacks in such close succession suggests that some of the assailants may have been copycats（模仿者）.

 lack of access to mental health care is a larger underlying factor（潜在的因素） that likely contributed to the recent violence

为什么会选择孩子？

 Part of the reason schools have been attacked is that they make easy targets（易于袭击的目标也可以说：soft target) for a deranged（疯狂的） assailant hoping to inflict （使吃苦头）as much harm as possible. "They hope that people will pay attention to their misfortunes when they bring about pain and horror in society," says Ma.

"It's the most effective way to achieve popular shock," says Ding.

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