Finland has seven combined heat and power plants that use coal either as the main or backup fuel for homes and businesses.

芬兰有7座热电联产电厂，使用煤炭作为家庭和企业的主要或备用燃料。

This machine draws water and breaks it down to its elemental state which then becomes backup fuel when the sun hides or the wind stills.

这个机器能抽取水并将其分解为基本状态，当没有太阳或风的时候，就能成为备份燃料。