concrete 指通过感官能看到、听到、触到的具体东西。其反义词是abstract。
specific 侧重指具体的细节，是与general(一般)，vague(模糊)相对的具体。
参考例句
1. The workmen are still busy concreting the road. 工人们仍忙着用混凝土铺路。
2. Attempts through to the concrete case analysis. 试图通过对具体案例的分析。
3. On the other hand, culture is concrete and specific. 另一方面，文化又是具体的和明确的。
英英解释
n.
1. a strong hard building material composed of sand and gravel and cement and water
2. cover with cement
3. form into a solid mass; coalesce adj.
1. capable of being perceived by the senses; not abstract or imaginary
2. formed by the coalescence of particles
