Defines a single variable that is not within a method.
定义一个不在方法内的变量。
A structure allows you to do this in a single variable.
结构允许在单个变量中实现。
Additionally, you can temporarily alter the value of an environment variable for a single command.
此外，您可以为单个命令临时地修改一个环境变量的值。
Indeed, the single biggest variable in determining a country's ranking is income per head.
事实上，决定一个国家排名的最重要的变量就是个人收入。
Or, if you wished, you could use a single current_section variable to keep place.
或者，如果愿意，可以使用单个current_section变量来确定位置。
The $ThingToProcess variable can contain only a single thing.
$ThingToProcess变量仅能包含单独一件事。
Another bad practice is to use single-letter variable names such as I, j, and k.
另一个糟糕的做法是用单字母的变量名如i,j,k。
The length of the lower glume is very variable, even within a single raceme.
更低的颖片的长度非常易变，即使在一单个的总状花序内。
You define a variable with a single declaration statement.
可以使用单个声明语句定义变量。
You have a single bulky method that accumulates information to a local variable.
你有一个较长方法，其主要为了积累局部信息。
You have a single bulky method that accumulates information to a local variable.
你有一个较长方法，其主要为了积累局部信息。
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