1. U 了解，理解　 understanding
2. U 个人的知识、学识、见闻　 all that a person knows; familiarity gained by experience
3. U 学问　 everything that is known; organized body of information

　add to ～　丰富知识
　advance ～　增进知识
　build up ～　积累知识
　demand ～　需要知识
　discover ～　发现知识
　gain ～　获得知识
　improve one's ～ of English　提高英语知识
　make ～ popular　普及知识
　pick up ～　学得知识
　show off one's ～　卖弄学问
　spread ～　传播知识
　store up ～　积累知识
　have a good ～ of London　对伦敦很熟悉
　have a good ～ of the subject　对这个问题了解很深
　have not much ～ of history　对历史知道不多
　lack a solid ～ of　缺乏对…的充分了解
　actual ～　实际知识
　basic ～　基础知识
　broad ～　广博的知识
　common ～　常识
　correct ～　正确的知识
　direct ～　直接的知识
　first ～　最初的知识
　general ～　常识
　inside ～　内情，内幕
　practical ～ of a language　语言的实用知识
　precious ～　宝贵的知识
　pure ～　纯理论知识
　scientific ～　科学知识
　sound ～　扎实的知识
　special ～　专门知识
　wide ～　渊博的知识
　background ～　背景知识
　book ～　书本知识
　grammar ～　语法知识
　sex ～　性知识
　reading ～　阅读能力
　speaking ～　会话能力
　working ～　应用能力
　beyond sb's ～　某人不知道的
　out of all ～　无法辨认的
　to sb's certain ～　据某人所知
　without sb's ～　背着某人，不告诉某人
　～ about　有关…的知识

　He denied any knowledge of them.　他否认了解他们。
　We have no knowledge of such a person in our community.　我们不知道社区里有这么一个人。
　Half knowledge of anything is dangerous.　对任何东西一知半解是危险的。
　The knowledge of our victory caused great joy.　获知我们胜利的消息使大家异常欢喜。
　To develop the knowledge of one another among the people of the world is an essential factor in the preservation of peace.　增进世界各国人民之间的相互了解是维护和平的基本因素。
　He was very sad to the knowledge that his wife was killed in an air crash.　得知妻子在飞机失事中丧生，他非常难过。
　There was brief knowledge that his brother had been executed by the police.　有一则简讯报道他的兄弟被警察处决了。
　His knowledge of the subject is limited.　他对那门学科的知识是有限的。
　I have little knowledge of cooking.　我几乎不懂烹饪技术。
　This is a significant contribution to knowledge.　这是对知识的重大贡献。
　I get fat knowledge from the book.　我从书中得到了丰富的知识。
　There can be no knowledge apart from practice.　离开实践就没有知识。
　The students are greedy for knowledge.　学生们对知识如饥似渴。
　He has acquired various branches of knowledge at the institute.　他在这所学院里学到了多方面的知识。
　This is a credulous age, and the burden of knowledge which we now have to carry is partly responsible.　如今是一个轻信的时代，究其缘由，部分责任在于我们现今必须掌握的知识实在太多了。
　Fifty years of intellectual toil produced the greatest of all medieval storehouses of knowledge. 　50年的辛苦脑力劳动产生了整个中世纪最大的知识宝库。
　Physical sciences deal with the knowledge of the world and space.　自然科学是有关世界和宇宙的知识。
　He is limited in an up-to-date knowledge.　他的最新知识有限。
　A knowledge of history is important for all of us.　历史知识对我们大家都很重要。
　Probably it will be useful for them to acquire a practical knowledge of English.　英语的实际知识可能对他们很有用。
　He has a superficial knowledge of a subject.　他对一门学科略知皮毛。

 ♣ be common〔public〕 knowledge
　人所共知　be known by everyone in a community or group
　It's pointless trying to keep your friendship secret—it's common knowledge already.　你们无须将友情保密——其实已尽人皆知。
　It is common knowledge that he is having an affair with another woman.　他与另外一个女人关系暧昧是众所周知的事情。
 ♣ come to sb's knowledge
　被某人知悉　become known by sb
　The matter never came to the knowledge of the teacher.　这件事老师始终不知道。
　It has come to my knowledge that train fares are going to be increased again.　我被告知，火车票又要涨价了。
　It has come to our knowledge that you have been cheating the company.　据我们了解，你一直在欺骗公司。
 ♣ to sb's knowledge
1. 据某人所知 as far as one knows
　To my certain knowledge, the dictionaries have arrived.　据我所知，这批词典已经运到。
2. 确知属实 as one knows to be true
　That is impossible, because, to my knowledge, he was in France at the time.　那不可能，因为我知道那时他在法国。
 ♣ with〔without〕 sb's knowledge
　（未）告知　(not) having informed sb
　He sold the car with his wife's knowledge.　他妻子知道，他把汽车卖了。
　She wrote the letter without any of our knowledge.　她写的那封信我们谁都不知道。
　The boy found himself in a boat without the slightest knowledge how he had got there.　那个男孩发现自己在一条船上，但他一点儿也不知道自己是怎么上去的。

 ♣ knowledge, learning
　参见learning条。
 ♣ common knowledge, general knowledge, common sense
　参见sense条。

1. 我是在上中学时才开始获得一点古典文学知识的。
　［误］ It was in middle school that I first learned some knowledge about classical literature.
　［正］ It was in middle school that I first obtained some knowledge about classical literature.
　［析］ knowledge作“知识”解，可与表示获得的动词acquire, gain, obtain等连用，但不能跟study或learn连用。
2. 经过几年的自学，他获得了不少知识。
　［误］ After several years' self-study he acquired a great deal of knowledges.
　［正］ After several years' self-study he acquired a great deal of knowledge.
　［析］ knowledge是不可数名词，没有复数形式。

　［同义词］ ability, apprehension, education, familiarity, intelligence, learning, notice, schooling, science, understanding, wisdom
　［反义词］ ignorance
　［词源］　古英语cnawler（认识了解）