求英语高手帮我修改一下这篇文章，主要是语法错误！PS：这是演讲稿！

What We Cannot afford to lose我们不能失去的
Nowadays many of us are spending our youthfulness thinking that we can waste many things because we are young . That's OK, though, your u\youthfulness is up to you.But can we really afford to lose anything?In fact,there are many things we cannot lose such as our health, our families and friends, air and water. Amoung which the most important one I think is time.
French writer Honore DE Balzac regards time as capital.In order not to make visitors delay visit time,Madame Curie never let s them sit in living room.We can see outstanding person is always the friend of time.
Time is eternity but the time each one owns is limited.What we should do is to take every second to learn more and to improve ourselves.If we can't make full use of it , we will regret when we are old and achieve nothing.
There are many things we have to seize.For example, chance,luck and hppiness.But they always disappear in a flash.Here is a word ,one‘s success depends on whether he can seize it but not how many times he meet it.Only when you take your every second can you have a bright future.
The beauty of life is you never know what is gong to happen next.After this time you may be successful or you may die.So you should treasure your time befor the last time.
Time is limited but you can lengthen your life by saving time .Catching your time, you are the biggest winner.

What we cannot afford to lose
Nowadays many of us are spending our youthfulness and thinking that we can waste many things because we are young .Well ,I will say your youth up to you,but can we really afford to lose anything?In fact,there are many things we cannot lose such as our health, our families and friends, air , water, and so on. but the most important one I think is Time.
French writer Honore DE Balzac regards time as capital.In order not to make visitors delay visit time,Madame Curie never let sit chair in living room.We can see outstanding person is always the friend of time.
Time is eternity but the time everyone owns is limited.
What we should do is to take every second to learn more and to improve ourselves.If we can't make full use of it , we will regret when we are older
and achieve nothing.
There are many things we have to seize. such as chance,luck and happiness.But they always disappear in a flash.Here is a word the success of one person depend on if he can seize it not how many times he meet it.Only when you take your every second
may you find them and have a bright future.
The beauty of life is You never know what is gong to happen going to. After this second you may be successful also you may die.So you should treasure your every time as the last time.
Time is limited but you can lengthen your life by saving time .Catching your time, you are the biggest winner.