成功不是一种权利，必须靠努力赢得。
Success is not an entitlement. It has to be earned.
The relation between what we see and what we know is never settled.
The speed of learning determines the speed of growth in the digital economy.
煤炭使美国在世界范围内保持竞争力。
我们现在可能年纪大了，但对表演的热情依然如故。
The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.