The goldsmith might also write notes promising so much gold and not promising the return of any particular item of gold.

这个金匠会写下票据,保证归还一定数量的金子,但是不保证归还某个特定的金器

耶鲁公开课 - 金融市场课程节选

If he switched from gold to let's say iron, he also tried platinum, a number of different foils, he found that they count rate it still was 20 alpha particles per minute.

金箔的时候，计数率就变成零了,如果他把金换成比如说铁，他们还尝试了铂,还有一系列其他的箔片，他发现计数率还是每分钟。

麻省理工公开课 - 化学原理课程节选

The most striking of which were death masks made of pure gold on the remains of the body, but also jewels, and implements, and weapons of very high expense.

其中最引人注目的是,覆盖在尸体上以纯金所制的面具,当然还有贵重的珠宝,器具,武器

耶鲁公开课 - 古希腊历史简介课程节选