translation.en: I mean, they are sexy -- but remember, 80 percent of the world's population lives by water, and that means our critical infrastructure is underwater -- the parts that we can't get to, like the bridges and things like that.
translation.zh: 没错，无人机确实很神奇——但请记住， 世界上80%的人口都生活在水边， 这就意味着我们关键的基础设施都在水里—— 而我们无法到达，比如桥梁等设施。