他们离开后，你的生活就空了。你应该再度向前，但你已忘了如何迈步。因为长久以来，都没有人叫你动。你自己也忘了要动。

The ground for taking ignorance to be restrictive of freedom is that it causes people to make choices they would not have made had they seen what their choices involved.

最好的保护策略是将经济激励与生态效益结合起来。