如果你想成为伟大的领导者,就必须善于倾听。
The web is for everyone and collectively we hold the power to change it.
Every year of delay makes the problem harder to solve.
大自然是伟大的老师,当别人睡觉时,我从她那里学得最好。
The beauty of instrumental variables is that they allow us to see the world in a new light.