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科学的进步不是一条直线,而是一系列曲折,常常需要回溯步骤以获得更好的立足点。
I never saw a wild thing sorry for itself. A small bird will drop frozen dead from a bough without ever having felt sorry for itself.
"The only thing that interferes with my learning is my education."
The best way to overcome fear is to face it.