introduce: is a general term for bringing or placing a thing or a person into a group or body  already in existence: ~d a new topic into the conversation.


insert: implies a putting in a fixed or open place between or among other things: ~ a clause in the contract.


insinuate: implies a slow, careful,sometimes artful introduction: slyly ~d himself into their confidence.    


interpolate: applies to the inserting of something extraneous or spurious: ~d her own comments into the report.  （extraneous无关紧要的外来的one is obliged to wade through many pages of extraneous material每人都得苦读很多页无关的资料）  （spurious逻辑推理似是而非(of a line of reasoning) apparently but not actually valid看似合理实际上不合理，如this spurious reasoning results in nonsense这种站不住脚的推理到头来都是废话）


intercalate: suggesting an intrusive inserting of something into an existing series or sequence: a book in which new material is ~d with the old.   (intrude不受欢迎的闯入to go to a place unwelcome and uninvited，如几个人聚会，另外一个人非要参加，是intruded into their party)


interpose: suggests the inserting of an obstruction or cause of delay: rules that ~ barriers between children and creativity.


interject: implies an abrupt or forced introduction of something that breaks in or interrupts: quickly ~d a question.   interjection感叹词.


introduce引入: 泛指把人或物带入放入已存在群体，insert插入: 放入固定的空缺的位置，insinuate潜入混入: 形容动作缓慢小心技巧，多用贬义，interpolate插入: 指插入无关的或似是而非虚假的(spurious有2个意思)，intercalate插入: 好像强行闯入未曾邀请不受欢迎，interpose插入: 指插入阻碍延迟物，interject:表示突然的打断性质的插入。



记忆方法: 1）首字母7个I<==插入谈话

        2）插入的意思是放到其他中间mean to put between or among others.