心灵研究必须基于生物学。

The city is a living organism, constantly evolving and changing.

每一次挫折都是为了卷土重来。

The interplay between quantum mechanics and computer science opens up new frontiers in both fields.

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.