The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.
Sustainability isn't an option—it's a responsibility we owe to the next generation.
容易得到的东西,是靠不住的;轻易许下的诺言,不值得信赖。
A true friend is someone who sees the pain in your eyes while everyone else believes the smile on your face.