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Language is the key to understanding higher mental processes.
每一个作用力总是有一个相等的反作用力与之对抗。
真正的挑战是让复杂的东西看起来简单。
I always try to stay focused on the present moment.
The beauty of physics lies in its ability to explain the universe with a few simple principles.
To understand recursion, one must first understand recursion.