不用圆规和曲尺，就不能画出方形和圆形。比喻做事要遵循一定的法则。

密码学是将信息转换成一种形式，使任何没有解锁密钥的人都无法理解的艺术。

It goes against the grain of modern education to teach children to program. What fun is there in making plans, acquiring discipline in organizing thoughts, devoting attention to detail and learning to be self-critical?

我们讲述的故事塑造了我们是谁。