1. Education is the door to freedom. 教育是通向自由之门 （一个简单的主系表结构）2. Challenges make life interesting.挑战使生活变得有趣（make +adj. 形容词作宾补）3. Difficulties make life worth living.困难让生活更有价值（make+介词短语作宾补）4. Nothing in the world can take the place of persistence.世界上没有任何东西可以代替坚持（否定词作主语，take the place of 代替）5. Its impossible to defeat a person who never gives up.打败一个永不放弃的人是不可能的。（动词不定式作主语）6. The most important thing in life is to have a great aim and the determination to attend it.生活中最重要的事情就是
