陈述是传达信息的手段,承诺是作出承诺的手段。
Chemistry is not just about mixing things in a flask. It's about understanding the world at a molecular level.
数学推理可以相当系统地看作是对两种能力的结合运用,我们可以称之为直觉和独创性。
If you’re not failing, you’re not pushing hard enough.