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最艰难的决定往往只需要问一个最简单的问题:"从长远来看,什么是对的?"
The laws of physics as we know them may not be universal, but could vary from one universe to another in the multiverse.
The personality of the teacher is the cornerstone of education.
颠倒,永远颠倒:把情况或问题颠倒过来。倒过来看。