聚合物

例句：

1. 1. Polymers are used in theproduction of plastics and rubber.
   聚合物用于生产塑料和橡胶。
2. 2. The scientist discovered anew type of polymer that could be usedto make stronger materials.
   科学家发现了一种新类型的聚合物，可以用来制造更坚固的材料。
3. 3.Polymers have many applications in engineering,including in the creation of advanced composite materials.
   聚合物在工程中有广泛的应用，包括在先进复合材料的制造中。