自由社会的原则对于人类进步和繁荣至关重要。
"The principles of a free society are essential for human progress and prosperity."
我不缺乏把一个想法彻底思考下去的勇气，到目前为止，我还没有遇到过我害怕的想法。
Technology is the great enabler in our quest for cleaner and more efficient energy solutions.
If a doctrine is not unintelligible, it has to be vague; and if neither unintelligible nor vague, it has to be unverifiable.