12:04duration 12 minutes 4 seconds
Energy and use of solar energy (English subtitles…
Energy and use of solar energy (English subtitles available)
Energy is defined as the ability to do work. It is vitally important to develop more efficient and environmentally friendly techniques for energy sources to keep modern society moving…
09:44duration 9 minutes 44 seconds
能源和太陽能的應用 (中文字幕可供選擇)
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