common knowledge是可数也是不可数。knowledge可表示“了解，知道”或“知识，认识，学问”等，是不可数名词。
例句：
His prejudices were common knowledge.
他的偏见是众所周知的。
扩展资料
Darwin took the tiniest step beyond common knowledge。
达尔文只比常识进步了一小步。
This is common knowledge and theres no disputing it。
这是常识而且没有任何争议。
It is common knowledge that the earth moves around the sun。
地球绕着太阳转是常识。
