1. The court ruled to invalidate the contract due to breach of terms.
法院裁决由于违反条款而使合同无效。

2. The thief tried to invalidate the evidence against him, but the jury saw through his lies.
小偷试图使针对他的证据无效，但陪审团看穿了他的谎言。

3. The professor invalidated the student's argument by presenting factual evidence that contradicted it.
教授通过提供与学生论点相矛盾的事实证据来使其无效。