The research has turned up a surprising list of materials that were mixed into old buildings.

这项研究发现了一系列被混合进古建筑物、令人惊讶的材料。

Speaking of, we're to fill our shells with any of a list of materials, the first of which is plaster.

说到这里， 我们要用一系列材料中的任何一种来填充我们的外壳，其中第一个是石膏。