书籍是通往其他世界的窗户。
"Books are the windows to other worlds."
我不会假装在冠状病毒之前一切都很完美。
The success of an enterprise depends on teamwork; the strength of an individual is limited.
The joy of mathematics is in the journey, not just the destination.
种树的最佳时间是25年前，第二好的时间是今天。
"The past is never dead. It's not even past."