什么是纸

Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibers. Although paper was originally made in single sheets by hand, almost all is now made on large machines. It is a versatile material with many uses, including printing, painting, writing, cleaning and protesting.

纸是一种通过机械或化学方法处理纤维素纤维而生产的薄片材料。虽然纸最初是用手工单张制作而成，但现在几乎都是用大型机器制作。它是一种用途广泛的材料，有许多用途，包括印刷、绘画、写作、清洁和抗议。