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Understanding the computational complexity of learning problems is essential for developing efficient algorithms.

【譯文】貧窮而沒有怨恨很難，富裕而不驕狂是容易的。

船總是被稱為“她”，因為保養一艘船需要花費大量油漆和裝飾。

"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them."

The sea is everything. It covers seven tenths of the terrestrial globe. Its breath is pure and healthy. It is an immense desert, where man is never lonely, for he feels life stirring on all sides.

To be happy, I must have my books and a piece of sky.