energy當精力講可數嗎

The system produced enough energy to heat several thousand homes.

系統產生的能量足以給幾千户人家供暖。

In the exam there's sure to be a question on energy.

考試時準有關於能量的'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.

人們對於原子能的看法已經轉變。