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。

The only real progress lies in learning to be wrong all alone.

我唯一害怕的是上帝。

And gladly would learn， and gladly teach.

科学与艺术并非对立。（摩尔斯同时是画家和发明家）

The only limits that exist are the ones in your mind.

People lie for all kinds of reasons, but mostly they lie because the truth is too hard.

"The challenge of biography is not just to record, but to illuminate."

有时帮助穷人的最好方式是给他们现金，让他们自己决定如何使用它。

耐心是一种美德，我正在学习耐心。这是一门艰难的课程。