As a substitution for fossil fuel, solid biomass fuel is a kind of clean and efficient energy which can alleviate human energy crisis and environment problems.
固体生物质燃料是一种高效的清洁能源，可以替代化石燃料，缓解人类面临的能源危机和环境困境。
2
The boiler uses solidfuel.
这个锅炉烧固体燃料。
《牛津词典》
3
The solidfuel consumption of sinter has been decreased greatly through insisting on using high-quality calces.