可持续性不仅仅是一个选择;这是我们对后代的责任。
Certification schemes are the floor, not the ceiling of responsible forestry practice.
To do mathematics is to engage in a dialogue with the universe, seeking answers to questions we may not even know how to ask yet.
There is no limit on better. Talent is distributed unfairly, but there is no limit on how much we can improve what we start with.