A covering for a wheel, usually made of rubber reinforced with cords of nylon, fiberglass, or other material and filled with compressed air.
轮胎车轮的覆盖物，通常由用尼龙绳、玻璃纤维或其它材料加固的橡胶制成，并注入了压缩的空气
The Powell structural research lab at the university of California at San Diego tests new bridge materials such as carbon and fiberglass polymers.
位于圣地亚哥的加州大学鲍威尔建筑实验室试制出了新的桥梁建筑材料，如碳和玻璃纤维聚合体。
