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ADJ. 形容词1.?明确具体的You use concrete to indicate that something is definite and specific. 近义词specific , precise , definite 双语例句例： I had no concrete evidence. 我当时没有明确而具体的证据。 例： There were no concrete proposals on the table. 没有提交讨论的具体提议。 2.?实物的A concrete object is a real, physical object. 近义词real , material , actual 双语例句例： using concrete objects to teach addition and subtraction. 用实物教加减运算。 3.?具体的（名词）A concrete noun is a noun that refers to a physical object rather than to a quality or idea.
NOUN. 名词1.?[U 不可数名词] 混凝土Concrete is a substance used for building which is made by mixing together cement, sand, small stones, and water. 双语例句例： The posts have to be set in concrete. 这些柱子必须固定在混凝土中。 例： We sat on the concrete floor. 我们坐在混凝土地板上。
VERB. 动词concretes , concreting , concreted 1.?[T 及物动词] 给（道路等）浇混凝土When you concrete something such as a path, you cover it with concrete. 双语例句例： He merely cleared and concreted the floors. 他只是清理了地板并浇上了混凝土。
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