Profitability and sustainability are not opposites; they are two sides of the same coin. A business that harms the environment ultimately harms itself.

希望不是一种情绪，而是一种选择。

Before I came here I was confused about this subject. Having listened to your lecture I am still confused. But on a higher level.

一个常见的经验是，一个晚上难以解决的问题在睡眠委员会工作后，在早上得到了解决。

我相信当一切似乎都出错时要坚强。