求翻译：我国有几亿大、中、小学校的在校学生，每年印刷新课本耗费大量的纸张。而造纸的原料主要是木材，循环使用课本可以大大减少树木的砍伐量，是什么意思？

China has hundreds of millions of large, primary and secondary school students in the school, the printing of new textbooks each year to spend a lot of paper. The main raw material for paper is wood, recycled books can greatly reduce the amount of tree felling,

My country, there are a few 100 million primary and secondary school students each year, and spent a lot of paper printing the new textbooks. The principal raw materials and recycled paper is recycled timber, use of textbooks can significantly reduce the rate of logging trees.

Our country in a big way has several hundred million, middle, the elementary school in the school student, every year prints the new textbook consumption massive paper.But papermaking raw material mainly is the lumber, the circulation use textbook may reduce the trees greatly the felling quantity,

There are hundreds of millions of Chinese big, middle and secondary school students, printing new textbooks spend a lot of paper each year. Papermaking raw materials mainly wood, recycled textbooks can greatly reduce the amount of felled trees,

There are hundreds of millions of Chinese big, middle and secondary school students, printing new textbooks spend a lot of paper each year. Papermaking raw materials mainly wood, recycled textbooks can greatly reduce the amount of felled trees,