| |||
alternative energy sources | |||
alternative energy resources; energy alternative | |||
alternative energy; substitute energy | |||
alternative energy source |
替代 能 源 : 14 phrases in 8 subjects |
Earth sciences | 3 |
Ecology | 1 |
Electronics | 1 |
Energy industry | 2 |
Environment | 1 |
Explosives and Explosive Ordnance Disposal | 2 |
Oil / petroleum | 2 |
Wind Energy | 2 |