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Buying tools: Start by buying the absolute cheapest tools you can find. Upgrade the ones you use a lot. If you wind up using some tool for a job, buy the very best you can afford.
夏天的飞鸟,飞到我窗前唱歌,又飞去了。秋天的黄叶,他们没有什麼可唱的,只是叹息一声,飞落在那里。