cause/kɔːz/
n.1. 原因；导致某事发生的人、事等The heavy rain was the cause of the flood.大雨是导致洪水产生的原因。
2. 动机；理由；根据There is no cause for anxiety.不必焦虑。
There is no cause for concern, for the windstorm was not too serious.那场风暴不太厉害，没必要担心。
3. 目标；理想；主义fight for the cause of world peace为世界和平而战
She has made up her mind to fight for the cause of peace all her life.她已下定决心为和平事业奋斗终身。