The term "$<" is a special predefined make variable that refers to the "source" for a rule.

术语 "$<" 是一个特殊的预定义的 make 变量，代表某条规则的 “源”。

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These engines perform optimizations to run code faster, and clearly, these optimizations make variable access much faster than others.

这些引擎在执行代码时进行了优化，而且很明显，这些优化使访问变量的速度比以往更快。

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When you created a variable in scratch, you could either make it for this sprite only or for all sprites.

当你在 scratch 中创建一个变量，你可以仅针对该精灵或针对所有精灵进行创建。

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For this sprite only, means local, only this function, only this script can use this variable, make this variable for all sprites, meant it was global.

对于只为一种精灵，意思是局部的，只有这个函数中，这个脚本中才可以用这个变量，这个变量为全部精灵而创建，意思是这个变量是全局的。

哈佛公开课 - 计算机科学课程节选

And obviously, that ought to involve the variable in some way, or it's not going to make a lot of sense, so this includes the variable, since that's the thing that's changing.

很明显，这跟计数器的变量有某种关系,否则的话就没多大意义了,因此这跟计数器有关，因为它正是每次循环改变的东西。

麻省理工公开课 - 计算机科学及编程导论课程节选

It's a common mistake to make if you forget that I've actually declared that variable up top, but wait a minute, I know any time that I use a variable, I have to declare it.

这是一个通常犯的错误，如果你忘了,之前在前面已经声明了这个变量，等等，我知道在任何时候,我使用一个变量，我必须声明它。

哈佛公开课 - 计算机科学课程节选

So to me the question is how to make this variable.

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In all cases, although inflation deviates from its target in the short run, the result is to make inflation and output less variable in the long term.

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That natural variable very well could make the Olympic Games a natural disaster.

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