I want to look at the energy starting from real material.
我们从身边真实的材料说起这些能量。
If you want more reference material now, Wikipedia is always a good starting point.
如果你想更多的参考材料，维基始终是个好帮手。
The downloadable material may also serve as a starting point for prototyping.
可下载的示例还可以作为开发原型的起点。
The source of the starting material need not be identified, but may be requested.
起始原料的来源通常无需说明，但有时会要。
The source of the starting material need not be identified, but may be requested.
起始原料的来源通常无需说明，但有时会要。
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