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他這種聰明，別人能做到，而這種愚傻，別人便難以做到了。

"Writing is the only profession where no one considers you ridiculous if you earn no money."

The real art of conversation is not only to say the right thing at the right place but to leave unsaid the wrong thing at the tempting moment.

在能源轉型中，煤炭在未來幾十年仍將是關鍵的過渡燃料。

To serve is beautiful, but only if it is done with joy and a whole heart and a free mind.

There can be no permanent progress in the battle against hunger until the agencies that fight for increased food production and those that fight for population control unite in a common effort.

The time for debate is over; the time for action is now.《Blue Horizons》

可持續性必須是現代采石場運營的基石，而非事后考慮。