decalin

例句：

1. 1. Decalin is a type of petroleum that is used in the production of plastics and other materials.
   石蜡是一种石油产品，用于生产塑料和其他材料。
2. 2. The decalin was extracted from the petroleum by distillation.
   通过蒸馏从石油中提取出石蜡。
3. 3.The decalin has a high melting point and low viscosity, making it ideal for use in heating systems.
   石蜡具有高熔点和低粘度，使其成为加热系统的理想选择。