1.释义： 原因，理由 （不可数名词）
2.搭配：
give cause for both hope and worry 喜忧参半
cause for worry/concern/alarm optimism/ satisfaction
3.例句：
The narrowing gap between bonds and stocks is grounds for anxiety, but not yet cause for alarm.
债券和股票之间越来越小的差距造成了焦虑，但还不至于恐慌。
4.造句：
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 how Internet companies treat their data, which is cause for concern.
租房价格越来越高，让很多年轻人忧心忡忡。
The young are facing huge rent increases, which gives cause for concern.
