自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
N-VAR 证据；证物；证言 Proof is a fact, argument, or piece of evidence which shows that something is definitely true or definitely exists.
You have to have proof of residence in the state of Texas, such as a Texas ID card...
This is not necessarily proof that he is wrong...
N-COUNT 校样；样张；初印稿 In publishing, the proofs of a book, magazine, or article are a first copy of it that is printed so that mistakes can be corrected before more copies are printed and published.
I'm correcting the proofs of the Spanish edition right now.
ADJ 标准酒精度 Proof is used after a number of degrees or a percentage, when indicating the strength of a strong alcoholic drink such as whisky.
...a glass of Wild Turkey bourbon: 101 degrees proof.
ADJ 不能穿透的；耐…的；能防…的 If something or someone is proof against a particular thing, they cannot be damaged, harmed, or affected by it.
The fortress was proof against the techniques of attack then in use...
His papers were proof against all but the most expert of scrutinies.
PHRASE 典型的例证；活生生的例子 If you say that someone is living proof of something, you mean that their actions or personal qualities show that a particular fact is true or that a particular quality exists.
He is living proof that some players just get better with age.
PHRASE 正面例子 To be proof positive of a particular fact or quality means to be evidence that it is true or that it exists.
The Windermere Golf Club is proof positive that golf and ecology can co-exist in perfect harmony.