The sun is the only source of light and heat we need.
太阳是我们所需要的光能和热能的唯一源泉。
The sun provides the main source of light and heat.
太阳是提供光和热的主要来源。
The green environmental protection without pollution, cold light source design, no heat radiation.
绿色环保无污染，冷光源设计，无热辐射。
People regard the sun as the chief source of heat and light.
人们认为太阳是主要的热源和光源。
People regard the sun as the chief source of heat and light.
人们认为太阳是主要的热源和光源。
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