领导力就是今天做出艰难的决定，以塑造更美好的明天。
The future of leather tanning lies in balancing tradition with technology.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。
The PAC learning framework provides a formal way to quantify the learnability of a concept class.
In mathematics, the journey of discovery is often more rewarding than the destination itself.