Sustainability isn't an option; it's a responsibility we owe to future generations.
夏天的飞鸟,飞到我窗前唱歌,又飞去了。 秋天的黄叶,他们没有什麼可唱的,只是叹息一声,飞落在那里。
The best mathematics is that which you do not understand at first glance.
Happiness is not something you postpone for the future; it is something you design for the present.