Along the way I have some tests, and depending on the value of that test, I may change where I am in that sequence of instructions.

我会按顺序进行一些测试，按照测试的数值，我会改变之指令序列中,我的位置。

麻省理工公开课 - 计算机科学及编程导论课程节选

A good, hygienic way of doing this is, not only do I not go in and change things except through a pre-defined method, I shouldn't read it other Cartesian than through a pre-defined method.

做这个的方式是，我不仅仅要通过提前定义好的方法,来改变数值,我还应该通过提前定义好的方法，来读这个值,我应该用。

麻省理工公开课 - 计算机科学及编程导论课程节选

Don't go in and change the values of things by using the direct access.

也就是别这么做,别直接去访问,并改变实例中的数值。

麻省理工公开课 - 计算机科学及编程导论课程节选

OK, this is great.

来改变数值的原因。

麻省理工公开课 - 计算机科学及编程导论课程节选