He gives her a necklace of proof gold.

他送给她一条纯金的项链。

youdao

As a result, gold is relatively "recession-proof," as evidenced by its relative strength in 2008.

因此，黄金是相对“抗经济衰退”的，它在2008年的相对强度证明了这点。

youdao

The proof of gold is fire; the proof of woman , gold; the proof of man , a woman.

检验黄金者炉火，检验女人者黄金，检验男人者女人。 （富兰克林）

youdao

The Mint's Oct. 6 announcement that it would not produce any gold "proof" coins this year is testament to its diminished capabilities.

FORBES: Magazine Article

The gold standard of proof is "contemporaneous records" such as time-stamped store receipts or a log.

WSJ: Tax Report: Rules for Renting Out Your Vacation Home

Most churches do but they are not actually required to, more proof church status is the gold standard.

FORBES: If 47% Don't Pay Taxes, Let's Tax Churches