数学的本质在于它的自由。
The essence of mathematics lies in its freedom.
宁可有求全责备之非议,也不要有不符实情之誉。
不把怒气转移到别人身上,不重复犯同样的错误。
We're not trying to preach, we're just trying to teach.
Sustainability is not an option; it's a necessity for any business that wants to thrive in the long term.