proof 1 S3 W3 / pruf / 名词

1 evidence [可数和不可数名词] facts, information, documents etc that prove something is true

proof of

proof of the existence of life on other planets

This latest interview was further proof of how good at her job Cara was.

proof (that)

Do you have any proof that this man stole your bag?

There is no proof that the document is authentic.

2 copy [可数名词，通常复数] technical a copy of a piece of writing or a photograph that is checked carefully before the final printing is done :

Can you check these proofs?

3 mathematics [可数名词]

a) a test in mathematics of whether a calculation is correct

b) a list of reasons that shows a theorem (= statement ) in geometry to be true

4 the proof of the pudding (is in the eating) used to say that you can only know whether something is good or bad after you have tried it

5 alcohol [不可数名词] a measurement of the strength of some types of alcoholic drink, especially spirit s :

70% proof vodka (= that contains 70% pure alcohol ) British English

70 proof vodka (= that contains 35% pure alcohol ) American English

COLLOCATIONS

动词

have proof The newspaper claimed it had proof that I worked for the CIA.

provide/give proof You will be required to provide proof of your identity.

need proof He needed proof to back up those allegations.

there is proof There is now proof that giant squid do exist.

形容词

further proof (= additional proof ) He showed his driving licence as further proof of his identity.

scientific proof They say they have scientific proof that the treatment works.

living proof (= someone whose existence or experience proves something ) She is living proof that stress need not necessarily be ageing.

clear proof His indecision is clear proof of his inability to handle the situation.

conclusive/tangible proof (= definite proof ) There is no conclusive proof that your son is dead.

短语

proof of identity (= something that proves who you are ) Do you have any proof of identity, such as a passport?

proof of purchase (= something that proves you bought something from a particular place ) We will give a refund only if proof of purchase is provided.

proof of ownership Take photos of anything unusual you own as proof of ownership.

proof positive (= definite proof that cannot be doubted ) Here is proof positive that she’s wrong.

the burden/onus of proof law (= the need to prove that you are right in a legal case ) The burden of proof is on the prosecution.