proof/pruːf/
n.1. 证明；证据Is what you say a guess or have your proof?你所说的是猜测还是有证据呢？
There is no proof that he was on the crime spot.没有证据证明他当时在犯罪现场。
2. 考验；试验The proof of the pudding is in the eating.布丁的滋味在于吃。（即空话不如实做）
3. 〈数〉验证4. 校样5. （酒类的）强度标准In the US whiskey of 90 proof is 45% alcohol.在美国，九十标准强度的威士忌就是含有百分之四十五的酒精。