Global variables should be in all caps.

全局变量应该全部大写。

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Package variables are global variables.

包变量是全局变量。

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Use of global variables should be minimized.

尽量减少全局变量的使用。

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Conceptually, it's put at the top of my chunk of RAM, -- below it, goes initialized and uninitialized data -- - this is a fancy way of saying global variables come next -- and below that, comes what's called the heap.

概念上，它放置在内存块的顶端，在下面，已初始化的和未初始化的数据-,这是一种指明紧随其后的全局变量的设想方式-,在后来，引入了一个叫做堆的东西。

哈佛公开课 - 计算机科学课程节选

Well, things can be fixed by a little trick called global variables.

好的，问题可以通过,一个叫做全局变量的东西来解决。

哈佛公开课 - 计算机科学课程节选

So, conceptually if you've ever wondered why you get access in all of your functions to global variables that's because they're not down here, they're at the very top of RAM and any function can access that RAM way up there, but for now the interesting player in the story is this thing called the heap.

所以，如果你想知道为什么全局变量能在,所有的函数中使用,那是因为它们不在这下面，而是在内存的顶端,那样任意函数都可以在内存中使用它们，现在，这里面一个有用的角色是,叫做堆的东西。

哈佛公开课 - 计算机科学课程节选

And in an increasingly competitive global economy, those variables are changing faster than ever before.

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The Knight Frank survey, scheduled for release Wednesday, ranks global cities based on a number of variables: economic activity, political power, quality of life, education and influence.

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The real challenge is figuring out whether a particular storm or flood was due to climate change or natural variables, said Chris Field, founding director of the Carnegie Institution's Department of Global Ecology.

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