No formula can be used to calculate your devotion;no poems and songs to express our heartfelt gratitude to you.Itis you that cultivate our minds with your extensive knowledge and your noble spirits.On this special occasion，please accept our best wishes!加减乘除，算不出您作出的奉献!诗词歌赋颂不完对您的崇敬!您用知识的甘露，浇开我们理想的花朵，在这不寻常的时刻，请接受我深深的祝福!

　　Running water in a hurry， the years in a hurry， only our friendship is always in my heart. Friends， goodbye! Friends，treasure!流水匆匆，岁月匆匆，唯有友情永存心中。朋友，再见!朋友，珍重!

　　Oh，my friend，do you like stars?If you feel lonely far away from home，look up at the stars in the sky， where there is a star for luck that Ive sent you.朋友，你喜欢星空吗?如果有一天你在远方流浪时感到孤独、忧郁，请抬头看看星空，那儿有我送给你的幸运星。

　　Life is a profound book.Other#39;s notes cannot replace your own understanding.May you find and create something new in it.生活是一本精深的书，别人的注释代替不了自己的理解。愿你有所发现，有所创造。