It's not a simple matter. Imagine what it would be like if you had to learn about sixty such things?

绝不是个简单的事,想象一下如果你得学,六十个字母会是什么状况

耶鲁公开课 - 古希腊历史简介课程节选

If they're not obvious to you what they're called, you need to just study them and learn them.

如果它们不想它们的名字那么显而易见，你们需要学习它们记住它们。

麻省理工公开课 - 化学原理课程节选