科技
1、Don't part with your illusions .When they are gone you may still exist , but you have ceased to live.(不要放弃你的幻想,当幻想没有了以后，你还可以生存，但是你虽生犹死）;
2、If winter comes，can spring be far behind？（冬天来了，春天还会远吗?)；
3、Man errs so long as he strives. （人只要奋斗就会犯错误)等。
