不要担心你在数学上遇到的困难;我敢保证我遇到的困难比你还大得多。
Never underestimate the power of persistence.
理解经济波动的关键在于技术冲击与家庭和企业决策之间的相互作用。
A building should be readable like a book.
Leadership in mining means making tough decisions that benefit all stakeholders, not just shareholders.