I don't sing because I'm happy; I'm happy because I sing.
The greatest gift you can give someone is your time and attention.
Sustainability isn't a trend—it's a responsibility we all share.
The paper industry has a responsibility to lead the way in sustainable practices—we can't wait for others to show us how.
最大的残疾是坏的态度。
贝尔不等式的实验违反表明，自然界无法用任何局域实在论理论来描述。