我看不到极限,我只看到可能性。
每一滴石油都应该被高效和负责任地使用。
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.
几个世纪以来纸张一直是人类知识的载体,我们的责任是确保它再延续几个世纪。#