n. a strong hard building material composed of sand and gravel and cement and water
v. cover with cement
v. form into a solid mass; coalesce
a. capable of being perceived by the senses; not abstract or imaginary
n. 凝结物, 混凝土
a. 具体的, 实在的, 混凝土的
v. (使)凝结, 用混凝土浇筑