read of concrete的意思|示意

It's one thing to read that refactoring should be done in "baby steps". It's entirely another thing to see a concrete example of how an experienced agile developer picks which baby steps to take.

在书里读到重构应该以“小步骤”完成是一回事，在一个具体的例子中体验敏捷开发人员是如何选择那些微小的步骤是另一回事。

I only read about the interest from Chelsea in the papers and on the Internet but nothing concrete came out of it.

我只是从报纸，网络上了解到切尔西对我的兴趣。但那没有任何实质性的意义。