动脉硬化是一种常见的血管疾病，会导致血液循环不畅。

Arterial ___sclerosis is a common vascular disease that can lead to poor blood circulation.

这家大学的管理层存在严重的僵化问题，难以适应现代教育的需求。

The university's administration suffers from ___sclerosis, making it hard to adapt to modern educational needs.