写程序要像写一封信一样小心。
Write a program as carefully as you write a letter.
The best way to have a good idea is to have a lot of ideas.
We must always question our assumptions and be willing to revise our understanding in light of new evidence.
解析：吃粗粮，喝清水，弯起胳膊当枕头，这其中也有着乐趣。