And they wanted to use a soluble salt of citric acid, so they could have used sodium, they could have used potassium.

而且他们想用一种柠檬酸的可溶性盐，他们本可以用钠，也可以用钾。

麻省理工公开课 - 化学原理课程节选

They control and dominate the Baltic trade, and herring is an important part of that, because herring will keep once it's salted and all that.

他们几乎控制和掌握了整个波罗的海贸易,而鲱鱼则是其中的重要组成部分,因为鲱鱼一旦用盐浸泡过就可长期保存

耶鲁公开课 - 欧洲文明课程节选