WHO recommends installing barriers around water and teaching swimming, proper water safety and rescue techniques.

世卫组织推荐在水域周围安装护栏、教授人们游泳、适当安全知识及救援技术。

After about 18 months of training, they learn how to jump from speeding boats and helicopters safely, among other rescue techniques.

在为期18个月的训练之后，它们学会如何安全地从快速移动的船只和直升机上跳下来，以及学习其他各种救援技巧。