1·Deriving cellulose from natural sources such as wood, tunicate (ocean-dwelling sea cucumbers) and certain kinds of bacteria, researchers prepare crystals of different sizes and strengths.
通过从天然来源，如木材，被囊动物(海参类)和某些种类的细菌中提取纤维素，研究人员可以制备不同尺寸和强度的晶体。