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The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life. You can turn over a new leaf every hour if you choose.

The only way to learn a new programming language is by writing programs in it.

世界充滿了故事，但所有的故事都是一個(gè)。

采礦的未來在于平衡經(jīng)濟(jì)增長(zhǎng)與環(huán)境管理。