海洋的资源并非无限;我们必须以智慧和克制来养殖这些资源。
Sustainable development requires balancing economic growth with ecological protection.
种树的最佳时间是20年前,次佳时间是现在。
There's only one corner of the universe you can be certain of improving,and that's your own self.
The most profound insights in mathematics often come from unexpected analogies.