The absolute number that you assign to it is something that's arbitrary. You have to set what the zero is. And so there's a well-understood convention for what the zero is.

你指定给它的绝对值是有任意性的,你需要设定零点的位置,因此有一个经过充分研究的,关于设定零点的约定。

麻省理工公开课 - 热力学与动力学课程节选

But so long as there is a non-arbitrary rule of law, then it's permissible.

但只要有一部非专制的法律，那这就是允许的。

耶鲁公开课 - 公正课程节选

Later in the term, we'll see why we have this syntax and why it wasn't just a totally arbitrary Python brain-dead decision by the designers of Python, and many languages before Python, but in fact is a pretty sensible thing.

这个学期的晚些时候,我们会去学学我们学这些语法的原因,以及这些语法其实并不是,和以前其他语言的设计者，一拍脑子做出的决定，实际上制定这些语法其实是相当明智的。

麻省理工公开课 - 计算机科学及编程导论课程节选

And what this means is we can use --take any arbitrary idea in the world, the idea of a chair or a story or a country, and make a sound or a sign to connect to it.

符号任意性是指,我们可以拿来世间任何想法,比如椅子,故事,或是国家,再发明一种声音或符号来与之相联系

耶鲁公开课 - 心理学导论课程节选