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在物理学的世界里,我们经常发现最简单的问题最难回答。
The speed of learning determines the speed of growth.
The best way to be happy is to live in the present.
"Everything is a learning process: any time you fall down, it's just teaching you to stand up the next time."
我对事物分崩离析时发生的情况感兴趣。
The best time to plant a tree was 20 years ago; the second-best time is now.