通往可持续性的道路充满了挑战和机遇。

烘焙业务既是科学，也是艺术。

The ability to associate depends, in turn, on the degree to which communities share norms and values and are able to subordinate individual interests to those of larger groups.

The best time to plant a tree was 20 years ago; the second best time is now.

一个问题的价值与其说在于得出答案，不如说在于它迫使潜在的解决者产生的想法和尝试的想法。