Some bills would require schools to put in place technology like panic alerts, security cameras and emergency communications systems.

有些法案要求学校安装恐慌警报、安全摄像头和紧急通信系统等。

Meantime, as part of the relief work, China has deployed satellites to capture images of the quake-hit areas and used drones to support emergency communications.

同时，作为救援工作的一部分，国家已部署卫星捕捉地震灾区的图像，并使用无人机支持紧急通信。

Anyway, amateur radio operators are licensed in part not just so they can have fun, but so they can help in emergency communication situations.

无论如何， 业余无线电运营商获得部分许可不仅是为了他们可以玩得开心，而且还可以在紧急通信情况下提供帮助。

The short message services can effectively supplement the ground mobile communication network and satisfy the demand for emergency communication and search and rescue work in areas without ground network coverage.

短报文业务可以有效补充地面移动通信网络，满足地面网络未覆盖地区的应急通信和搜救工作需求。