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

Goldsmiths are people who work in gold; they make jewelry and gold -goldware and whatever -coffee urns.

金匠就是处理金子的人,他们制作珠宝和黄金,金器之类的东西,还有咖啡壶

耶鲁公开课 - 金融市场课程节选