Coal is China's main energy source and will remain the cornerstone of China's energy security for a long time to come.
煤炭是我国的主体能源，在相当长时期内仍将是我国能源安全的基石。
电影不是关于道德，而是关于真相。
The only way to achieve the impossible is to believe it is possible.
To understand the mind, we must first understand its evolutionary purpose.
一件事情都不能做到有始有终，就不要去操持其他的事情;一物也不明白，就不要追求博闻广记。