I can't put my finger on what exactly makes a written piece a classic.
我不知道什么使一篇著作成为经典。
What we can't get seems better than what we have.
人们得不到的好像比所拥有的要好。[九六全国高考]
The Native Americans caught and trained them and were then able to use them to carry their goods when they travelled from one camping ground to another.