结合李群李代数方法，系统地研究了多特征的位形空间理论，给出了定向公差约束子流形的局部参数显式表达。

A systematic introduction to the theory of configuration space of multi-features is given, appealing to Lie groups and algebras.

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这样，应用等效热降的法则，不但可以计算热力系统局部参数及系统变化时单位新蒸汽做功的变化，还可以计算这些局部参数变动所引起的上述其它参数变化量。

This new method can be used to calculate the changes in the work done by fresh steam while the thermal system and any local parameters vary. Two examples are given to check the algorithm.

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And when you declare a variable, whether as an argument or as literally a local variable, they only live inside of that function.

当你声明一个变量，不论是一个参数,还是一个局部变量，它们只存在函数的内部。

哈佛公开课 - 计算机科学课程节选