请问：energy、source 、power、material 的不同用法

请问：energy、source 、power、material 的不同用法 energy,source,power,material有什么区别? develop a clean energy source 怎么翻译 请问下PO 请问Power Source是什么牌子? 请问下面英语句子写得有问题吗?A question regarding whether residents of northeasternUnited States will continue to use oil as their major energy source is alsoneeded to be answered.如果有问题,该怎么改? FLUENT问题,什么是inlet diffusion和diffusion energy source,什么时候考虑它们? solar is the latin word for sun--and it's a powerful source of energy.4564 energy energy Energy po po 求翻译.wind power is an ancient source of energy to which we may return in the near future the sun _ _ we get heat is the most important source of energy定语从句填空两空 meaning:Wind power is an ancient source of energy which we may return to in the near future this is a great energy source for the bee,and is is very useful to produce honey.5046 请问外贸中的PO,PI,CI,