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有甘苦,尝之者识;道有夷险,履之者知。
事物是甜还是苦,尝试过的人才能辨别;道路有平坦与险阻,走过的人才知道。
We build not for today, but for how today will be remembered tomorrow.
The study of mathematics is like air or gravity – it’s everywhere, even if you don’t see it.