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Start where you are, with what you have. Make something of it. Never be satisfied.
证明的目的是理解,而不仅仅是验证。
The mind is a constantly adapting process.
I don't have time to worry about who doesn't like me. I'm too busy loving the people who love me.
【释义】当商品价格高涨时,要像对待粪土一样迅速出售;当商品价格低廉时,要像对待珠玉一样大量购入。