The only thing we have to fear is fear itself.

还有什么地牢比自己的心更黑暗！还有什么狱卒比自己更无情！

Innovation in medical technology requires a deep understanding of both the scientific principles and the practical needs of patients.

君子会因人恭维赞美自己而疏远他，也会因对自己之言劝谏和他成为亲密的朋友。