解释：第一次击鼓能振作士兵们的勇气，第二次击鼓可以使士兵们的勇气低落，第三次击鼓士兵们的勇气就消失了。
"To understand the future, one must first understand the past."
You can reduce the annoyance of someone’s stupid belief by increasing your understanding of why they believe it.
Keep your face always toward the sunshine, and shadows will fall behind you.
当我们理解基于知识的系统时，情况将与以前一样-除了我们的指尖会被选中。
"I'm the best rapper alive."