在一次实验中，他必须将硫磺和纯橡胶混合在一起。
One experiment led him to combine sulfur with the pure rubber, whereupon he accidentally dropped the mixture onto a red-hot stove.
常用物料有铜、沥青、塑料、橡胶混合而成，和投标指定的厚度和阔度。
Materials commonly used include copper, asphalt, plastic, rubber, composition, and combinations of these materials, Bid the gauge of thickness and width specified.
这块橡胶混合了硫磺，经过高温处理后，在受冷时会变软，受热时能变硬。
This rubber, mixed with sulphur and then exposed to intense heat, was flexible in cold yet firm in heat.
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