可持续性不是一种选择;而是我们对后代的责任。
Sustainability isn't an option; it's a responsibility we owe to future generations.
The past is always tense, the future perfect.
真正的谈话艺术不仅是在正确的地方说正确的话,而且是在诱惑的时刻不说错误的话。
It is always good to have a problem that you cannot solve. It means you have something to work on.
It is fortunate for governments that the people do not think.