The system produced enough energy to heat several thousand homes.
系統產生的能量足以給幾千戶人家供暖。
In the exam there's sure to be a question on energy.
考試時準有關于能量的題目。
It's a waste of time and energy.
那是浪費時間和精力。
He has carried out extensive research into renewable energy sources.
他已經對再生能源進行了廣泛研究。
There has been a move away from nuclear energy.
人們對于原子能的看法已經轉變。