燃气发动机是所有热机中最完美的，因为它结合了蒸汽机和内燃机的优点。

Happiness is not something ready-made. It comes from your own actions.

维护程序的最好方法是维护它。

Law is not a system of rules, but a system of rules and principles.

"Every journey conceals another journey within its lines: the path not taken and the forgotten angle."

The most important thing is to be honest with yourself and your audience.

解释：只是一种声音就没有听头，只是一种颜色就没有文采，只是一种味道就不成其为美味，只是一种事物就无法进行衡量比较。