永远不要停止质疑如何改进事物。
The stranger is close to us, insofar as we feel between him and ourselves common features of a national, social, occupational, or generally human, nature. He is far from us, insofar as these common features extend beyond him or us, and connect us only because they connect a great many people.
科学进步是以一次次的葬礼为代价的。
最伟大的科学家是那些永不停止学习的人。
The dead might as well try to speak to the living as the old to the young.