* tear up 是可以分开的短语动词，因为既可以说 She tore the letter up ，又可以说 She tore up the letter。

The phrasal verb 'tear up' is separable because you can say 'She tore the letter up' or 'She tore up the letter'.

《牛津词典》

当库克船长问塔希提岛的酋长们，为什么总是和其他人分开并单独吃饭，他们回答说：“因为这是正确的。”

When Captain Cook asked the chiefs in Tahiti why they always ate apart and alone, they replied, "Because it is right."

youdao

一方面，它很重要是因为它把有自我意识的动物和没有自我意识的区分开来。

For one thing, it is important because it sets animals with a sense of self apart from those without a sense of self.

youdao

Let me cluster them because really what I have, sorry, separate them out. I've gone from one problem size eight down to eight problems of size one.

让我把它们聚集起来，因为已经得到我想要的，抱歉，把它们分开来,现在我从一个长度为8的问题,得到了八个长度为1的问题。

麻省理工公开课 - 计算机科学及编程导论课程节选

Because we made time and space independently, was we in fact violating the time-out rule?

因为将时间和空间,分开考虑，违背腾时间原则了吗？

麻省理工公开课 - 媒体、教育、市场课程节选

This proves to be really difficult in the real world because in the real world it's hard to pull apart genes and environments So, you and me will have different personalities ? Why?

这在现实中是很难区分的,因为现实中很难,把基因和环境分开来讲,你和我有不同的性格,为什么？

耶鲁公开课 - 心理学导论课程节选