Health is not a privilege of the rich, but a vulnerability of the poor.
Every lump of coal we mine keeps the lights on in someone's home.
在奥林匹克誓言中,我只要求一件事:体育忠诚。
好奇心是成就的引擎。
量子力学不仅是一种理论,而且是一种关于自然的新思维方式。