动词短语
中文翻译：证明是合法的
同义词：
['prove legal', 'verify legality']
例句：
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1. The company's decision to invest in new technology was a strong proof of its commitment to innovation.
该公司决定投资新技术，这是其对创新承诺的有力证明。
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2. The lawyer's argument was a powerful proof that the defendant had indeed committed the crime.
律师的论点是有力的证据，证明被告确实犯下了罪行。
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3. The police officer's thorough investigation was a crucial proof that the suspect was not involved inthe robbery.
警察官员的彻底调查是关键证据，证明嫌疑人并未参与抢劫。