同学你好，该知识点来自沪江网校《中级水平直达雅思7分【剑桥全能随到随学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好

可以看一下fashion的英文解释

1、当不可数名词讲时，意思是Fashion is the area of activity that involves styles of clothing and appearance. 时尚界
如：There are 20 full-colour pages of fashion for men.
有20张男士时尚动态的全彩页。
2、当可数名词讲时，意思是 A fashion is a style of clothing or a way of behaving that is popular at a particular time. 时尚
•  In the early seventies I wore false eyelashes, as was the fashion.
70年代初我戴假睫毛，那是当时的时尚。
•  The demand for perfume resulted in a fashion for fancy scent bottles.
对香水的需求使别致的香水瓶成为一种时尚。
3、当单数名词讲时，意思是If you do something in a particular fashion or after a particular fashion, you do it in that way. 方式
•  There is another drug called DHE that works in a similar fashion.
另有一种叫作二氢埃托啡的药作用相似。

所以需要具体的语境来选择是否加the或者加a或者不加
希望帮到你