The original :
紙的發(fā)明對世界文化和國家交流是一個重大的貢獻瞻坝。最早的漢字是刻在動物的骨頭或烏龜殼上的钧椰。戰(zhàn)國時期（the Warring States Period ）,文字開始被刻在竹簡上（bamboo slips）上粹断。然而，骨頭嫡霞、竹片和木頭都非常重瓶埋，不便于攜帶。到了西漢時期诊沪，當時的貴族（noble caste）用的是絲綢或棉花做的薄紙养筒。這種紙不僅便于書寫，還特別適合作畫端姚。但是其造價太高晕粪，平民百姓根本承受不起。公元105年渐裸，東漢官員蔡倫在學習總結前任造紙方法的基礎上發(fā)明了一種新型的低成本植物纖維（fiber）紙巫湘。
Reference translation :
The invention of paper is a great contribution to the world's cultural development and international communication.The earliest Chinese characters were carved on animals bones or tortoise's shells.During the warring States Period, bamboo slips were used instead.However,bones ,bamboo slips ,wood were too heavy to carry.During the Western Han dynasty, the noble caste wrote on thin paper made from silk or cotton.It's easy to write and even excellent to paint on this kind of paper.However,it was so expensive that the civilians couldn't afford it.In 105 A.D. ,Cai Lun,a high-ranking official in the Eastern Han Dynasty ,learned from the old way of paper making AMD invented a new kind of cheap plant fiber paper.
