even if the bran came from the pharmacy rather than the canteen.即使这些麦麸来自药房而非餐厅

even if:即使

We should practice economy even if we are rich.

即使我们富裕了也仍应该厉行节约。

come from:来自； 起源于

Most of these children come from broken families.

这些孩子中的多数人来自婚姻破裂的家庭。

rather than:而不是

She is pretty rather than attractive.

她是漂亮，而不吸引人。

These are political rather than social matters.

这是政治问题而不是社会问题。

Scientists urgently needed to understand the root causes of the problem.我们亟需科学家研究出其病根

root causes :根源

He argues that one of the root causes of crime is poverty.

他认为犯罪的一个根本原因是贫穷。

Unhappiness is the root cause of his illness.

不开心是他生病的根源。