太阳发出光和热，这是地球上人们主要的能源。
The sun gives off light and heat. It is the major source of energy for people living on earth.
两人还讨论了空间站上使用的科技如何帮助改善地球上人们之间的关系。
The two men also talked about how technology used in space may be able to help relations between people on Earth.
Platzer说，通过建造大帆船就可基本满足地球上人们对能源的需求。
With enough ships, the energy needs for the entire planet could be met this way, Platzer says.
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