Biomass power production is not cost efficient at present because the average price is 6.9 c/kWh while fossil fuels are
问题描述：
Biomass power production is not cost efficient at present because the average price is 6.9 c/kWh while fossil fuels are accessible for an average of 4.2–4.8 c/kWh.
答
Biosmass ower production 在目前还不是很有效率因为平均价格在6.9分/千瓦时而化石燃料的价钱在大约4.2-4.8分/千瓦时.
C应该是美分~cent的意思