案由的英语怎么说

案由是指案件的原因或事由。它来自法语，在英语中翻译为"cause of action"。
例句：
The plaintiff's cause of action is based on breach of contract.
该原告的案由基于合同违约。
The defendant was found liable for the plaintiff's cause of action.
被告被判负责原告的案由。