evaluation作为评价来翻译是不是可数名词?

可数名词和不可数名词的用法都有.
用作可数名词时,用复数的情况较少.
如：Teacher does a brief evaluation.老师作一个简单的评价.（用a,可见是可数名词）
The product needs an expert's evaluation.这种产品需要专家评定.
They gave the young singer quite different evaluations.他们对这个年轻歌手的评价大相径庭.