paraffin sweating

例句：

1. 1.The paraffin is used as a lubricant in the machine.
   这种石蜡被用作机器的润滑剂。
2. 2. Paraffin is a solid at room temperature.
   石蜡在室温下是固体。
3. 3. The paraffin was extracted from petroleum.
   这种石蜡是从石油中提取出来的。