做名词时加of
eg 1. Proof of health insurance.健康证明书.
2. Britain's National Health Service agrees: having studied the available research, it finds no proof of harm from turbines.英国国民保健体系赞同道：经对相关调查进行研究,并未发现涡轮机产生危害的证据.
3.The wedding prayer book, for example, is tangible proof of my parents spirituality and religious beliefs.结婚用的祈祷书就是有形的证据,证明了父母精神的纯洁和宗教信仰.
做动词时直接加宾语,因为它是及物动词.