社会结构的研究是对社会关系系统的研究。

How far you go in life depends on your being tender with the young, compassionate with the aged, sympathetic with the striving and tolerant of the weak and strong. Because someday in your life you will have been all of these.

The best decisions are made when you listen to diverse perspectives.

人在学习上，如果不每天进步就会每天退步。

可持续发展不仅仅是保护树木；它关乎确保自然和人类共同繁荣的未来。