看一些国外c语言的书籍的时候经常出现“左值”与“右值”之类的字眼，翻译的时候可能由于语言的界限，难免望文生义。上维基百科查了一下，服务器空间，结果如下：
L-value
From Wikipedia, the free encyclopedia
L-value or L value may refer to:
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R-value
From Wikipedia, the free encyclopedia
R-value can refer to:
Properties of materials: R-value (insulation), the efficiency of insulation of a houseR-value (soils), stability of soils and aggregates for pavement constructionr-value, in computer science, a value that does not have an address in a computer languageR-factor (crystallography), a measure of the agreement between the crystallographic model and the diffraction data
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另外还有liotta朋友给了一些其他方面的提示：
错了，没有什么左值和右值！
翻译害人不浅，
L-value中的L指的是Location，表示可寻址。The “l” in lvalue can be though of as location
R-value中的R指的是Read，表示可读。The “r” in rvalue can be thought of as “read” value.
翻译有的时候还是不准的，香港虚拟主机，起码在含义方面会有一定的出入，所以推荐尽量看原版图书，这样也可以锻炼自己的英语水平。
，虚拟主机积极的人在每一次忧患中都看到一个机会，
