... 九九九毒天鹅 999 poisonous swan 九九九怪尸案 999 the mysterious body 太阳功率密度solar power density ...
权威例句
1.
Simple math shows that a marginal gas or oil well has a powerdensity at least 22 times that of a wind turbine while a nuclear power plant has a powerdensity that is more than 8 times that of a solar photovoltaic facility.