底部的材料通常是由拉伸的聚乙烯材料制成，可以起到进一步的缓冲作用。这种材料和在汽车仪表盘和保险杠表面的吸能泡沫材料属于同一种材质。
Further cushioning is provided by the base material, which is usually made of expanded polyethylene-the same foamy stuff used in cars to provide shock-absorbent surfaces for dashboards and bumpers.
又短又弯的纤维分散在表面，就像细小的弹簧一样，使得长一些线头一直挺立着，同时又产生一定的缓冲作用。
Interspersed between them are short, curly fibres that work like tiny springs to keep the longer tufts upright while also giving a measure of cushioning.
缓冲的一个最有效的应用是在表面渲染上。
One of the most powerful USES of buffers is for surface rendering.
应用推荐