1. 释义：a reason for having particular feeling or behaving in a particular way
2. 理解："cause"作名词表示“原因”，也可表示“理由”，这时可与“reason"替换。
"cause"作“理由”解时，是不可数名词，其前不加a/an，最常见搭配有be/give cause for concern/celebration/alarm/worry
3. 应用
1）翻译：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 way how Internet companies treat their data, which gives cause for worry.
2) 造句
The conflict between business operators inside and outside the market is cause to concern.（市场内外经营户间冲突引人担忧）
