1. The rheology of this polymer is quite complex, and it exhibits non-Newtonian behavior under certain conditions.
这种聚合物的流变学非常复杂，在某些条件下表现出非牛顿流动行为。

2. The study of rheology is important in understanding the behavior of fluids and materials in various applications.
流变学的研究对于理解流体和材料在不同应用中的行为十分重要。