Some Republican-led states have approved more money for school safety to help schools pay for new devices like panic buttons.

有些共和党领导的州已经批准了更多的资金用于学校安全，以帮助学校支付紧急按钮等新设备的费用。

The wearable " panic buttons" introduced in the late 1980s were a great advance.

80 年代后期推出的可穿戴“紧急按钮” 是一个巨大的进步。

We know that, in general, animals with bigger panic buttons have a more sensitive fight or flight response, and animals with smaller panic buttons are naturally tamer.

我们知道，一般来说，恐慌按钮越大的动物对战斗或逃跑的反应越敏感，而恐慌按钮越小的动物天生就更温顺。

In the last few years, several schools in the U.S. have added panic buttons and live-stream cameras so that police officers can see inside classrooms in real time if a gunman enters a school.

在过去的几年里，美国的几所学校都增加了紧急按钮和直播摄像头，这样警察就可以在枪手进入学校时实时看到教室里的情况。