研究人员发现老年痴呆症患者的大脑中存在大量淀粉样蛋白沉积。

Researchers found excessive ___amyloid deposits in the brains of Alzheimer's patients.

这种淀粉样物质在显微镜下呈现出与淀粉相似的结构。

The ___amyloid material shows a structure similar to starch under the microscope.