There's a very thin line between the two and we therefore use the same pedagogical methods in the sense that we've got to do the following.

两者之间的差别很微妙,因此我们接下来要做的,就是采用与语言课相同方法教学

耶鲁公开课 - 聆听音乐课程节选

It's made of strong metal, it's got very thin slits to be able to see straight ahead, covered up; everything else is covered up, a good one will cover your neck as well.

头盔是坚固的金属制成,正面有一条很细的开口能让士兵看到前方,左右两边都包住,剩下所有地方都包住,好一点的头盔甚至能保护颈部

耶鲁公开课 - 古希腊历史简介课程节选