It has units of time, it represents the price of time, and it is something that fluctuates through time in interesting patterns.

这是一种时间的单位,代表着时间价值,利率以它特殊的模式,随着时间上下摆动

耶鲁公开课 - 金融市场课程节选

You're going to know more details about it, they're not really colors, they're chemicals, specific chemicals - but the pattern is the same.

通过它,你可以知道更多,DNA不是真有颜色 它们只是化学物质,特殊的化学物质,不过模式是一样的

耶鲁公开课 - 生物医学工程探索课程节选