But celluloid, which had developed a reputation as a cheap mim-ic of better traditional materials, was de-rived from chemically treated cotton and other cellulose-containing vegetable matter.

众所周知，赛璐璐虽价格低廉，能仿制质量较好的传统材料，它却是取自化学处理的棉花和别的含有赛钱璃纤维素的蔬菜之中。

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New, lightweight ceramics will further reduce the need for metals in aircraft, says Joy DE Lisser, vice-president of ATK Aerospace Structures, the division developing them.

新型轻质陶瓷的使用将进一步减少飞机制造中的金属需求，乔伊•德•丽萨说道，她是AT K航空航天公司的副总，他们分公司正在开发这种材料。

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Maleation finds wide applications in polymeric materials de-signing.

马来酸酐化在聚合物材料设计中有广泛的应用。

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