interpolate
/ɪnˈtɜ:pəleɪt; ɪn`təpəˌlet/ v[Tn, Tn.pr]
~ sth (into sth) (fml 文)
1 make (a remark, etc) which interrupts a conversation, speech, etc 插入（言语等）
If I may interpolate a comment, before you continue your speech... 很抱歉打断你的演讲, 请让我插句话....
2 add (sth) to a text, book, etc, sometimes misleadingly （在文章、 书等中）插入文字等（有时指篡改）
Close inspection showed that many lines had been interpolated into the manuscript at a later date. 经仔细检查发现不少字句是後来添写进原手稿中去的.