have knowledge of sth
knowledge 不可数，前面可加形容词如 good, deep 等。
She has a good knowledge of Chinese history.
她对中国历史有很好的了解。
了解；熟悉；通晓
knowledges — plural of knowledge
知识；学问；学识；知道；知晓；获悉；学科；知识领域；学问；得到确证的真信念；感知、学习和推理的心理结果
Understanding or familiarity with a subject, skill, or situation.
The fact of knowing about something; general understanding or familiarity with a subject, place, situation etc.
感知、学习和推理的心理结果
the psychological result of perception and learning and reasoning
Awareness of a particular fact or situation; a state of having been informed or made aware of something.
Intellectual understanding; the state of appreciating truth or information.
Familiarity or understanding of a particular skill, branch of learning etc.
Justified true belief
The total of what is known; all information and products of learning.
Something that can be known; a branch of learning; a piece of information; a science.
She gained a lot of knowledge about history from reading books.
她从读书中学到了很多历史知识。
用法提示：这里“knowledge”作名词，表示通过学习获得的信息和了解。
His knowledge of computer programming helped him solve the problem quickly.
他的计算机编程知识帮助他快速解决了问题。
用法提示：这里“knowledge”作名词，表示在某一领域的专业理解。
The test measured the students' general knowledge of science and math.
这次测试考察了学生在科学和数学方面的常识。
用法提示：这里“knowledge”作名词，表示普遍掌握的信息。
knowledge 不可数，前面可加形容词如 good, deep 等。
She has a good knowledge of Chinese history.
她对中国历史有很好的了解。
固定短语，表示‘据某人所知’。
To the best of my knowledge, the meeting is still on.
据我所知，会议仍在进行。
常用作表语，表示‘常识’。
It's common knowledge that smoking is harmful.
吸烟有害健康是常识。
表示‘知道…的情况下’，后接从句。
He went to bed in the knowledge that he had done his best.
他带着已经尽力了的想法上床睡觉。
强调对事物本质的把握，比knowledge更侧重理解深度
侧重专业领域的深入知识，比knowledge更具体
侧重对事物存在的感知，比knowledge更偏感知层面
强调判断力和洞察力，比knowledge更抽象且含价值判断
grammar · medium
易错句子I have many knowledges about history.
正确表达I have a lot of knowledge about history.
Knowledge 是不可数名词，不能使用复数形式，应使用 much 或 a lot of 等修饰。
grammar · medium
易错句子I need more knowledge about this topic.
正确表达I need more knowledge of this topic.
表示‘关于某方面的知识’时，应用介词 of 而不是 about。
信息；资料（强调原始数据或事实，未经加工）
智慧；明智（强调经验、判断力和洞察力）
常识
It is common knowledge that smoking is harmful to health.
吸烟有害健康是常识。
一般知识
The quiz tested our general knowledge of world history.
这次问答测试了我们的世界史一般知识。
专业知识
His expert knowledge in engineering solved the complex problem.
他在工程方面的专业知识解决了一个复杂问题。
深入了解
She has an in-depth knowledge of ancient Chinese literature.
她对中国古代文学有深入的了解。
先前知识
The course assumes no prior knowledge of programming.
本课程假设没有编程的先前知识。
实用知识
You need a working knowledge of Spanish for this job.
做这份工作需要西班牙语的实用知识。
root: know, suffix: ledge
与知识密切相关的活动，获取知识的过程
传授和获取知识的系统化过程
知识的深度应用和判断力
通过实践获得的知识积累
构成知识的原始数据或事实
常识
It's common knowledge that smoking is harmful to health.
众所周知，吸烟有害健康。
据某人所知
To the best of my knowledge, the meeting is still scheduled for Friday.
据我所知，会议仍定在星期五。
知识就是力量
He believed that knowledge is power and read extensively.
他认为知识就是力量，因此广泛阅读。
知识就是力量。
The saying 'Knowledge is power' emphasizes the importance of education.
谚语'知识就是力量'强调了教育的重要性。
唯一阻碍我学习的就是我的教育。
Albert Einstein reminds us that knowledge can sometimes be limited by formal education.
阿尔伯特·爱因斯坦提醒我们，知识有时会被正规教育所限制。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.