When you borrow a man's car, always return it with a tank of gas.
采矿技术的创新不是可选的，而是我们对下一代的责任。
Ask funders for money， and they’ll give you advice； but ask for advice and they’ll give you money.
"A personality is a full Congress of orators and pressure-groups, of children, demagogues, communists, isolationists, war-mongers, mugwumps, grafters, prayer-meetings, spiritualists, and astrologers."