Limiting the maximum number of live variables: this is typically achieved by keeping expressions simple and small, and not using too many variables in a function.

限制活变量的最大数目：通常可以使用简单小巧的表达式，在函数内部不使用太多的变量。

youdao

At first, this seems kind of limiting but it actually has some very nice consequences: if a function is called twice with the same parameters, it's guaranteed to return the same result.

一开始会觉得这很受限，不过这恰恰是它的优点：若以同样的参数调用同一函数两次，会得到相同的结果。

youdao

The UpdateTimestamp() function performs a substitution (s/.../.../) on every line being written, by specifically limiting the range of the substitution to between '[ and '] like so: '[,']s/.../.../.

UpdateTimestamp() 函数，通过专门将替换的范围限制在 '[ 和 '] 之间，在每个正在被编写的代码行上执行一个替代（s/.../.../），像这样：'[,']s/.../.../。

youdao

The limiting factor is mostly a function of the amount of external space available for antennas.

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