Safety isn't just a policy, it's a culture that starts at the top.
安全不仅仅是一项政策，它是一种从高层开始的文化。
The dinosaurs became extinct because they didn't have a space program. And if we become extinct because we don't have a space program, it'll serve us right!
教育者的心必须是一团活生生的火焰，是温暖和光明的源泉。