concrete: adj.1.具体的，有形的；实在的，实际的。2.固结成的，混凝土制的。3.图案诗歌的(参阅concrete poetry)。短语和例子a concrete fact 具体事实。 a concrete vessel 混凝土船。 in the concrete 具体地，实际上。n.具体物；凝结物；混凝土；【逻辑学】具体名词；【文学】具体诗歌。 a concrete-mixer
Example Sentences:
1.
Recently they had learned to cast light concrete boats 最近他们学会了浇铸轻型水泥船。
2.
Recently they had learned to cast light concrete boats 最近他们已学会了浇铸轻型水泥船。
