英语knowledge可数吗

　　He had an encyclopedic knowledge of drugs.

　　他有渊博的药品知识。

　　I was amazed at the extent of his knowledge.

　　他知识之渊博令我惊奇。

　　The boy's knowledge was out of the ordinary.

　　这个男孩的.知识面非同寻常。

　　It is beyond the confines of human knowledge.

　　这超出了人类的知识范围。

　　He had only a rudimentary knowledge of French.

　　他只有最基本的法语知识。