Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.
每部电影都是一次旅程，不仅是对角色，对观众也是如此。
创新是将矿业转变为全球进步力量的关键。
任何公司最有价值的资产都是它的员工。
The world is full of obvious things which nobody by any chance ever observes.