All right, kids, I gotta get to work. If I don't input those numbers,... it doesn't make much of a difference... ---《老友记》 第一季 第一集
通常是用为可数的,但有时也是不可数的
eg.1,There are many differences between living in a city and living in the country(不同之处，差异）
2, make all the difference (非常重要；作用很大）
difference 可用作可数名词亦可用作不可数名词，常与介词 between 连用，表两者间的不同。
典例 ：
It's hard to see many differences between the two parties.
很难看出两党之间有多少不同。（两党之间并没有很多差异。）
What is the difference between American food and Chinese food?
中国食物与美国食物有什么不同？
There is not much difference in price. 在价格上没有太大差异