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The human voice is the most beautiful instrument of all, but it is the most difficult to play.

在理論物理學的領域里，每一個發現都會帶來新的問題和挑戰。

Your passion in life should fit you exactly； but your purpose in life should exceed you. Work for something much larger than yourself.

醫學是我的合法妻子，文學是我的情婦。