SCA注释可用来在Spring bean类内显式声明sca服务、引用和属性。

SCA annotations can be used to explicitly declare the SCA services, references, and properties within your Spring bean classes.

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类的属性：属于某个类的对象的属性。类的属性都在类定义的内部，在类内方法之外。

An attribute associated with a class object. Class attributes are defined inside a class definition but outside any method.

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首先，通过重新定义样本的类内散布矩阵和类间散布矩阵，提出了一种新的零空间法。

First, by redefining the within class scatter matrix and the between class scatter matrix, a new null space method was presented.

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Many steroid hormones act because they bind to cellulars - to receptors that are deep within the cell, often inside the nucleus.

许多类固醇激素能够起效是因为,其与存在于细胞内部的受体相结合,这类受体通常在细胞核内

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I don't have to put an init in, but it's again, usually a good idea to put that in originally.

类定义内做些什么其他的东西呢？,好，在两个例子里，我都有init声明。

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