So, if you want to designate anything it has to be by tangible things like pottery,particularly painted pottery,because it's easier to categorize.

所以 如果你想标注某段时期,你必须借助有形的事物,就像陶器,尤其是彩绘陶器,因为它们更容易分类

耶鲁公开课 - 古希腊历史简介课程节选

Accent is something somewhat difficult to define and categorize.

重音是很难定义和分辨的。

耶鲁公开课 - 现代诗歌课程节选