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In chemistry, as in life, the most profound truths are often the simplest.
The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'
顾客不一定总是对的,但他们永远是第一位的。
To be a Negro in America is to be in a constant state of rage.
No man is useless in this world who lightens the burden of someone else.