是可数的。原形是expression。名词含义为：表现，表示，表达；表情，脸色，态度，腔调，声调。常见短语搭配：archaic expression陈旧词语；artistic expression有艺术表现才华的人；awkward expression笨拙的措词。
expression的用法例句
1. It's enough to make you wet yourself, if you'll pardon the expression.
这足以吓得你尿裤子了，请原谅我这么说。
2. He screwed his face into an expression of mock pain.
他面部扭曲，假装疼痛。
3. Under the shaded light her expression was difficult to read.
她的表情隐在阴影中，很难读懂。
4. There was no grief in his expression, only deep resignation.
他的表情里没有悲痛，只有深深的无奈。
5. Mr. Sebastian was looking at the boys with a bemused expression.
塞巴斯蒂安先生一脸茫然地看着男孩儿们。