能源转型不仅仅是更换燃料；它是关于整个系统和思维方式的转变。

They had said that the city was a paradise, but I found it a hell.

"Sometimes, the hardest thing and the right thing are the same."

That “democracy” is a somewhat vague term which I cannot define precisely. We ought to say, therefore: “I am fairly certain that it is a good thing if a government has something of the characteristics that are common to the British and American Constitutions,” or something of this sort.