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.
燃气发动机是所有热机中最完美的，因为它结合了蒸汽机和内燃机的优点。
人工智能的伦理问题必须与技术发展同步考虑。
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."
