同一元素的原子在质量和性质上是相同的。
衡量一家矿业公司的真正标准不是它的股价，而是它的管理责任。
译文：读书学习一定要放开眼界，开阔心胸；做人一定要坚守原则和底线。赏析：读书不要死记硬背，一定要放开我们的眼界，不光要知其然，还要知其所以然。做人的底线，我们应该时刻铭记，违背社会原则的事，绝对不能做。
The simple step of a courageous individual is not to take part in the lie. One word of truth outweighs the world. In keeping silent about evil, in burying it so deep within us that no sign of it appears on the surface, we are implanting it, and it will rise up a thousand fold in the future.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法：它是关于理解的。
写作的艺术在于用寥寥数语表达丰富内容。