唯一真正的爱是对美的爱。

解析：告诫人们要珍惜所得。

每个城市都有性别和年龄，这与人口统计无关。

The real challenge is not growing more, but growing better with fewer resources.

Parents wonder why the streams are bitter, when they themselves have poisoned the fountain.

In times of change, the ability to adapt and remain agile is what separates the winners from the losers.