Portland cement is plain cement powder and specifically says Portland cement.

普通硅酸盐水泥是水泥粉，具体说，硅酸盐水泥。

youdao

We asked if the use of antibiotic-laden bone cement (ALBC) decreased the deep infection rate after primary total knee arthroplasty as compared to plain bone cement.

我们探讨使用载抗生素骨水泥（ALBC）与单纯骨水泥比较可降低初次全髋关节置换术后深部感染率。

youdao

Massive use of cement -"Original Ecology"- both on the wall and floor brings people with original, plain and rough intuitive feelings.

设计师在墙面、地面大面积运用水泥原生态材质，给受众营造原生、质朴、粗糙的直观感受。

youdao

It was an impressive demo, one that I think will cement the SuperPhone category this year, and clearly differentiate it from plain ol Smartphones (which will continue to dominate shipments).

FORBES: CES: The Six Features That Will Define The SuperPhone of 2011