扩展程序的最好方法是扩展它。

"Only through suffering does one understand the depth of life."

The most important thing in life is to stop saying 'I wish' and start saying 'I will.'

Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers.

种树的最佳时间是二十年前，其次是现在。