请将下面这段话翻译成英文：

　　一个人的生命究竟有多大意义，这有什么标准可以衡量吗?提出一个绝对的标准当然很困难;但是，大体上看一个人对待生命的态度是否严肃认真，看他对待劳动、工作等等的态度如何，也就不难对这个人的存在意义做出适当的估计了。古来一切有成就的人，都很严肃地对待自己的生命，当他活着一天，总要尽量多劳动、多工作、多学习、不肯虚度年华，不让时间白白地浪费掉。我国历代的劳动人民以及大政治家、大思想家等等都莫不如此。

　　参考翻译

　　Is there a standard to evaluate the significance of one's life?It's certainly difficult to offer a definite standard.But generally speaking,we can tell it by judging his attitude towards life and work,making clear whether he is serious about his life.

　　Throughout the history,the outstanding people were all very serious about their lives.They made best use of every minute of their lives to work and study as much as possible,never wasting their time.None of the working people and the great statesmen and their thinkers were of exception.