形容词

1. Shoes and trees are concrete objects.
鞋和树是实物。

2. Beauty is not concrete but a door is.
美丽不是具体物，但门是。

3. His plan is not yet concrete.
他的计划尚不具体。

及物动词

1. The workmen are concreting the road.
工人们在用混凝土铺路。

名词

1. These buildings are made of concrete and steel.
这些房屋是用钢筋混凝土建成的。

1. 混凝土：ault) 混凝土(Concrete)建筑的核心以混凝土为材质.混凝土的骨料则是变化的.万神庙的穹顶一共分5层.每层28个藻井.方格越向上越小.给人以穹顶的重量.装饰混凝土的使用和因此引发的技术变革.使各种建筑在平面与规模上新获得了巨大的发展余地.庞培古城(Pampeii)坐落在意大利.罗马帝国极盛时期的统一和高度集中力量在城市规划中比

2. 水泥：在西方世界,有时候会把水泥(concrete)称作Portland cement(波特兰白垩),这是由於英国人Joseph Aspdin在1824年为了建造不会被海水冲垮的灯塔而研发出来的建材.

1. 混凝土
Concrete is a substance used for building which is made by mixing together cement, sand, small stones, and water.

e.g. The posts have to be set in concrete...
这些柱子必须用混凝土固定。
e.g. They had lain on sleeping bags on the concrete floor.
他们就躺在铺在混凝土地面上的睡袋上。

2. 用混凝土浇筑(或覆盖)
When you concrete something such as a path, you cover it with concrete.

e.g. He merely cleared and concreted the floors.
他只是把地面清理之后浇上了混凝土。

3. 具体的;确实的
You use concrete to indicate that something is definite and specific.

e.g. He had no concrete evidence...
他没有确凿的证据。
e.g. There were no concrete proposals on the table...
没有具体的提议可供讨论。

noun

1. a strong hard building material composed of sand and gravel and cement and water