And then we calculate changes, the convention is understood with respect to what is the zero, right.

然后我们计算改变,这个约定就是用来规定零点的位置的。

麻省理工公开课 - 热力学与动力学课程节选

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

It's moving through a sequence of instructions, occasionally changing where we are as we move around.

它经过指令序列，在，我们移动的时候随机改变我们原本所处的位置。

麻省理工公开课 - 计算机科学及编程导论课程节选