可持续性不仅仅是植树；它是为了正确的理由在正确的地方种植正确的树木。

Only unfulfilled love can be romantic.

The past is a foreign country; they do things differently there.

The beauty of mathematics lies in its ability to reveal the underlying simplicity in what appears to be complex.

The most important single central fact about a free market is that no exchange takes place unless both parties benefit.

唯一真正的发现之旅不在于寻找新的风景，而在于拥有新的眼光。

历史实际上不过是人类罪行、愚蠢和不幸的记录册。