Every day is a new opportunity. You can build on yesterday's success or put its failures behind and start over again.
The most profound ideas in mathematics often arise from the simplest observations.
OPEC no longer holds all the cards in global oil markets.
Sustainability is not a destination but a journey that requires continuous improvement and innovation.
事情在完成之前总是看起来不可能。
"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers."