以“a life without a friend is a life without a sun”为题作一篇演讲

英语翻译
请高手帮忙翻译下这篇英语作文,感激不尽!
A life without a friend is a life without a sun.Friendship is one of the most important things in everyone's life.
Friends are who changes your life just by being a part of it,who makes you believe that there really is good in the world,who convinces you that there really is an unlock door just waiting for you to open it.
When you’re down,friends lift you up.When you lose your way,friends guide you and cheer you on.
So cherish your friend,
Do not save your loving speeches,for your friends till they are dead
Do not write them on their tombstones,speak them rather now instead →Do not save your loving speeches,for your friends till they are dead
Do not write them on their tombstones,speak them rather now instead这两句请高手改下好的，带翻译~

英语翻译
我不能想象出没有音乐的生活.(a life without)
你知道树能产生氧气吗?(produce )
我们应该与污染做斗争.(fight against)
运动有益于健康（be good for ）
你能从那些伞中辨认出你的伞吗?（identify,from..）
所有的人都应该遵守交通规则.（obey the traffic rules）
你能帮我从超市买一袋糖果吗?（buy sth for sb）
那些电脑已被连接到网络上了（be connected to） 正确高

Bats a surprisingly long-lived creatures,some_____ a life span of around 20 years.
A having B his C have D when
A having B his C have D to have

请问一下，这句话As the saying goes,"A life without a friend is a life without the sun."是as引导的非限制性定语从句吗，请说明一下理由，十分感谢。

请问一下，这句话As the saying goes,"A life without a friend is a life without the sun."书上说是as引导的非限制性定语从句吗，我觉得不是，请说明一下理由，帮忙分析一下，十分感谢。

请问这句话怎么翻译
If what researchers are saying is true, a life lived without fantasies and daydreams isn’t as rich and rewarding as life can be.