translation.en: I mentioned we looked at birds and marine mammals and looked at basically the environmental impact of the system, and finally we looked at the economics, and what I mean by economics is, what is the energy required to run the system?
translation.zh: 我提到过我们观察过鸟类和海洋哺乳类 观察过这个系统对环境的影响 最终，我们也考虑了经济因素， 我所指的经济因素是， 要运行这个系统需要什么能源？