concrete example的用法和樣例：
例句
- Throughout the book there will be concrete examples on developing most of the component types introduced here.
在本書中將有大部分使用這里介紹過的組件類型來開發的具體例子。 - Operator theory, like every other part of mathematics, cannot be properly studied without a large stock of concrete examples.
算子理論如同數學的每一其它部分，如果沒有大量具體例子作為儲備，就不能真正地進行理論考察和研究。
