Sustainability isn't just about planting trees; it's about planting the right trees in the right places for the right reasons.
局部和全局现象之间的相互作用是数论中反复出现的主题。
The history of all hitherto existing society is the history of class struggles.
人们不会使用手持计算器来学习计算,但是却会忘记算术。
舞蹈是身体的歌声。
没有道德或不道德的书,只有写得好或写得差的书。
人们为了生存,会去杀害别人。