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The best prophet of the future is the past.

人是萬(wàn)物的尺度：對(duì)于存在的事物，它們存在；對(duì)于不存在的事物，它們不存在。

I'm not the best singer in the world, but I'm passionate about what I do.

The best time to plant a tree was 20 years ago. The second-best time is now.