A concrete class that implements the DAO interface.

一个实现了dao接口的具体类。

youdao

The class can be either an interface or a concrete class.

这个类既可以是个接口，也可以是个明确的类。

youdao

What if the code we have uses a concrete class in its implementation?

如果我们拥有的代码在执行中使用一个具体的类该怎么办？

youdao

He had a vision of doing all of his class work digitally, a vision that became concrete once he acquired his first iPhone.

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And what about a clear, concrete vision for returning prosperity to working- and middle-class America?

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The smart concrete homes of Salvapan, with swings in neat gardens, are a class above the clapboard houses in the creole south side of Belize City.

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