畜牧业的每一个挑战都是创新的机会。

The writer is a person who writes, not a person who is written about.

If you can't fly then run， if you can't run then walk， if you can't walk then crawl， but whatever you do you have to keep moving forward.

计算中随机性的研究带来了计算机科学中一些最深刻的见解。