knowledge不可数。释义：n. 学问；了解；知识；认识；知道。
knowledge可表示“了解，知道”或“知识，认识，学问”等，是不可数名词。有时在knowledge前可直接加上不定冠词a，表示“对…有某种程度的了解或熟悉”。
扩展资料
例句：
A measure of technical knowledge is desirable in this job.
做这项工作最好多懂一些技术知识。
He has a wide knowledge of painting and music.
他在绘画和音乐方面知识渊博。
There is a lack of knowledge about the tax system.
大家对税制缺乏了解。
For years we had little knowledge of what life was like inside China.
以往很多年我们对于中国国内的生活情况所知甚少。
He never made a will, to the best of my knowledge.
据我所知，他从未立过遗嘱。
