As proof of his love, he spent all his money on a ring for her.

作为他的爱的证明，他花了所有的钱为她买了一枚戒指。

youdao

The buyer has to sign a delivery note as proof of receipt.

购买者必须签收送货单表明货已收到。

《牛津词典》

As proof of the amount owed to it, the hospital offered in evidence a computer printout of the services rendered to the defendant and the amounts owed for them.

为了证明所欠的款额，医院以一份为被告所服务的电脑打印件和所欠的款额作为证据。

youdao

This evidence can be used by investigators who are working to solve the crime and as proof in a court of law.

VOA: special.2010.05.05

"Everywhere in Latin America, enemies of America are going to use the picture of Chavez smiling and meetingwith the president as proof that Chavez is now legitimate, that he is acceptable,".

VOA: standard.2009.04.20

"I think that by having people adopt a healthy lifestyle, both from a medical standpoint as well as nutritional and cognitive stimulation standpoint, that we can reduce the incidence of cognitive decline, which will be proof that these factors are, in fact,important."

VOA: standard.2010.06.17

Wynberg Regional Court was handed a medical certificate as proof of Xolile Mngeni's condition.

BBC: Dewani honeymoon murder: suspect has brain surgery

Most emerging markets see their ability to attract foreign money as proof of good management.

ECONOMIST: Economics focus

As proof of this, Pynchon sites that women are now 50% of all law students.

FORBES: Cats Are Better Negotiators Than Dogs