cause: a reason for having particular feelings or behaving in a particular way

“cause”是名词，它最基本也是很多学习者最熟悉的意思是“原因（cause and effect）”，不过它也可以用来表示“理由”。

be/give cause for concern/celebration/alarm

如果我们想表达某个东西让我们喜忧参半，就可以用“give cause for both hope and worry”

bonds and stocks 股票与债券

cause = grounds

cause lies in sth 原因在于……

cause and effect 因果

the cause of death

due to/from/of natural causes

discover / find / identify cause

用户对互联网公司对用户数据的使用越来越不满，这令互联网巨头忧心忡忡。

Users are increasingly dissatisfied with the data usage in the Internet company. That is cause for worry.

（参考翻译：Users are increasingly dissatisfied with how Internet companies treat their data. That is cause for worry. 或者 Internet users grow increasingly discontent with the way their data are treated by Internet companies, which is cause for concern.)