practic作名词；解释为“练习”时……是可数名词还是不可数名词?……

n.
1.实行,实施,实践[U]
I am afraid the idea would never work in practice.
恐怕这想法实际上行不通.
2.(反复的)练习,学习[C][U]
Learning a language needs a lot of practice.
学习语言需要勤练不辍.
3.(医生、律师等的)业务,工作,营业[C]
Dr.Pat is no longer in practice here.
派特医生不在这儿行医了.
4.习惯,常规,惯例[C][U]
The old practice still prevails in the countryside.
旧习俗在乡间仍然流行.
5.【律】诉讼手续
注析下啦:[C]可数,[U]不可数,自己看上面的吧