concrete
adj
1 existing in material form; that can be touched, felt, etc 以物质形式存在的; 具体的; 实体的
Physics deals with the forces acting on concrete objects. 物理学研究作用於物体上的力. Cf 参看 abstract.
2 definite; positive 确实的; 明确的; 确定的
concrete proposals, evidence, facts 明确的建议、 确实的证据; 确定的事实
The police have nothing concrete togo on. 警方没有任何确实的东西作依据.
concrete n [U]
building material made by mixing cement with sand, gravel, etc and water 混凝土
a slab of concrete 混凝土板
modern buildings made of concrete 用混凝土建造的现代建筑物
[attrib 作定语]
a concrete path, wall, etc 混凝土的路、 墙等. concrete, v [Tn, Tn.p] ~ sth (over) cover sth with concrete 用混凝土覆盖; 铺设
concrete a road (over) 用混凝土铺路.
Apparently what happened was that water collected on these tar pits, and the bigger animals like the elephants ventured out on to the apparently firm surface to drink, and were promptly bogged in the tar.