三者的词性不同，意思也不有所不同
adj. 有耐力的，防...的，耐...的
There is no proof that he was there at that time. 没有证据证明他那个时候在那里。
This watch is waterproof. 这块手表是防水的。
This room is soundproof. 这个房间是隔音的。
He is wearing a bulletproof vest. 他穿着防弹背心。
be proof against criticism. 经得起非议
prove v. 证明，证实，试验，由经难得知He has proved his courage in battle. 他已经在战斗中证明了他的勇敢。
My advice proved to be right. 我的建议证明是对的。
provable adj. 可证实的，可证明的。 provably adv.
approve v. 批准，认可，通过（计划，要求等）They didn't appove my proposal. 他们没有通过我的提议。
The budget plan has been approved. 预算计划被批准了。
approval n. 批准，认可，赞成，赞许He showed his approval by smiling. 他用微笑表示赞许。
