数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。
The truth is not always comfortable, but it is necessary.
Innovation is at the heart of what we do. It's how we meet the world's growing energy needs while reducing our environmental footprint.
书籍的魔力在于它们可以带你去任何地方。
Quality is not an act, it is a habit.