If you were to draw this line to the right here, this is the secondary part of the plant which every plant, whether it be fossil or nuclear, has to produce its steam.
The process of coal changing into electricity is the process of making fuel fossil into cleanly secondary energy sources.
煤电转化过程是将化石燃料煤转化为洁净的二次能源电的过程。
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On the other hand, some deciduous gymnosperms including Ginkgoales, and the presence of growth rings in the fossilsecondary wood, indicate seasonal changes.