viscous heating

例句：

1. 1. The material has a high viscosity, which makes it difficult to mix.
   这种材料黏度很高，很难混合。
2. 2. In order to improve the quality of the product, we need to use more viscous heating agents.
   为了提高产品的质量，我们需要使用更多的黏性加热剂。
3. 3. The viscous heating agent can be used to heat up the liquid quickly and evenly.
   这种黏性加热剂可以用来快速均匀地加热液体。