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 their data are treated by Internet companies. That is cause for worry.
2) Lofty ideals are not great cause for foul means.
3) cause——原因与理由之辨析：
1* (常指坏事的)原因，诱因；The cause of an event, usually a bad event, is the thing that makes it happen.
Smoking is the biggest preventable cause of death and disease...
2* 理由;缘由；If you have cause for a particular feeling or action, you have good reasons for feeling it or doing it.
Both had much cause to be grateful for the secretiveness of government in Britain.
双方都有充分的理由对英国政府的行事隐秘深表感激。
4) reason 理由
[搭配]ADJ.
good, great, real, reasonable
正当的/ 充分的/ 真正的/ 合理的理由
[搭配]VERB + CAUSE
have 有理由
We have good cause to believe that he was involved in the crime.
我们有充分理由相信他涉嫌此案。
find 找理由
The experts may find cause to disagree with the school’s decision.
专家可能找理由不同意校方的决定。
give (sb)给（某人）理由
Her health is giving us great cause for concern.
她的健康状况让我们十分担心。
show 表明理由
The onus is on government departments to show cause why information cannot be disclosed. 政府部门有责任说明不能把信息公开的理由。
[搭配]PREP.
~ for 导致…的理由
There is no cause for alarm. 没有必要恐慌。
[搭配]PHRASES
cause for concern 担心的理由
with/ without good cause 有/ 没有充足的理由
without just cause 没有正当的理由
